internal/rosa: key metadata by string

For upcoming azalea integration. The API is quite ugly right now to ease migration. Signed-off-by: Ophestra <cat@gensokyo.uk>
2026-05-17 13:07:12 +09:00
parent c2ff9c9fa5
commit 30eb0d6a61
95 changed files with 1514 additions and 1567 deletions
--- a/internal/rosa/acl.go
+++ b/internal/rosa/acl.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newAttr() (pkg.Artifact, string) {
+func (t Toolchain) newAttr(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.5.2"
 		checksum = "YWEphrz6vg1sUMmHHVr1CRo53pFXRhq_pjN-AlG8UgwZK1y6m7zuDhxqJhD0SV0l"
 	)
-	return t.NewPackage("attr", version, newTar(
+	return s.NewPackage(t, "attr", version, newTar(
 		"https://download.savannah.nongnu.org/releases/attr/"+
 			"attr-"+version+".tar.gz",
 		checksum,
@@ -65,7 +65,7 @@ ln -s ../../system/bin/perl /usr/bin
 	), version
 }
 func init() {
-	artifactsM[Attr] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newAttr,

 		Name:        "attr",
@@ -73,15 +73,15 @@ func init() {
 		Website:     "https://savannah.nongnu.org/projects/attr/",

 		ID: 137,
-	}
+	})
 }

-func (t Toolchain) newACL() (pkg.Artifact, string) {
+func (t Toolchain) newACL(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.3.2"
 		checksum = "-fY5nwH4K8ZHBCRXrzLdguPkqjKI6WIiGu4dBtrZ1o0t6AIU73w8wwJz_UyjIS0P"
 	)
-	return t.NewPackage("acl", version, newTar(
+	return s.NewPackage(t, "acl", version, newTar(
 		"https://download.savannah.nongnu.org/releases/acl/"+
 			"acl-"+version+".tar.gz",
 		checksum,
@@ -94,7 +94,7 @@ func (t Toolchain) newACL() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[ACL] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newACL,

 		Name:        "acl",
@@ -106,5 +106,5 @@ func init() {
 		},

 		ID: 16,
-	}
+	})
 }
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -1,447 +0,0 @@
-package rosa
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"net/http"
-	"runtime"
-	"strconv"
-	"sync"
-
-	"hakurei.app/internal/pkg"
-)
-
-// PArtifact is a lazily-initialised [pkg.Artifact] preset.
-type PArtifact int
-
-const (
-	LLVM PArtifact = iota
-
-	// EarlyInit is the Rosa OS init program.
-	EarlyInit
-	// ImageSystem is the Rosa OS /system image.
-	ImageSystem
-	// ImageInitramfs is the Rosa OS initramfs archive.
-	ImageInitramfs
-
-	// Kernel is the generic Rosa OS Linux kernel.
-	Kernel
-	// KernelHeaders is an installation of kernel headers for [Kernel].
-	KernelHeaders
-	// KernelSource is a writable kernel source tree installed to [AbsUsrSrc].
-	KernelSource
-	// Firmware is firmware blobs for use with the Linux kernel.
-	Firmware
-
-	ACL
-	ArgpStandalone
-	Attr
-	Autoconf
-	Automake
-	BC
-	Bash
-	Binutils
-	Bison
-	Bzip2
-	CMake
-	Connman
-	Coreutils
-	Curl
-	DBus
-	DTC
-	Diffutils
-	Elfutils
-	Fakeroot
-	Findutils
-	Flex
-	FontUtil
-	Freetype
-	Fuse
-	GMP
-	GLib
-	Gawk
-	GenInitCPIO
-	Gettext
-	Git
-	Glslang
-	GnuTLS
-	Go
-	Gperf
-	Grep
-	Gzip
-	Hakurei
-	HakureiDist
-	Hwdata
-	IPTables
-	Kmod
-	LIT
-	LibX11
-	LibXau
-	LibXdmcp
-	LibXext
-	LibXfixes
-	LibXfont2
-	LibXrandr
-	LibXrender
-	LibXxf86vm
-	Libarchive
-	Libbsd
-	Libcap
-	Libconfig
-	LibdisplayInfo
-	Libdrm
-	Libepoxy
-	Libev
-	Libexpat
-	Libffi
-	Libfontenc
-	Libgd
-	Libglvnd
-	Libiconv
-	Libmd
-	Libmnl
-	Libnftnl
-	Libpciaccess
-	Libpng
-	Libpsl
-	Libseccomp
-	Libtasn1
-	Libtirpc
-	Libtool
-	Libucontext
-	Libunistring
-	Libva
-	LibxcbRenderUtil
-	LibxcbUtil
-	LibxcbUtilImage
-	LibxcbUtilKeysyms
-	LibxcbUtilWM
-	Libxcvt
-	Libxkbfile
-	Libxml2
-	Libxshmfence
-	Libxslt
-	Libxtrans
-	LMSensors
-	M4
-	MPC
-	MPFR
-	Make
-	Mesa
-	Meson
-	Mksh
-	MuslFts
-	MuslObstack
-	NSS
-	NSSCACert
-	Ncurses
-	Nettle
-	Ninja
-	OpenSSL
-	P11Kit
-	PCRE2
-	Parallel
-	Patch
-	Perl
-	PerlLocaleGettext
-	PerlMIMECharset
-	PerlModuleBuild
-	PerlPodParser
-	PerlSGMLS
-	PerlTermReadKey
-	PerlTestCmd
-	PerlTextCharWidth
-	PerlTextWrapI18N
-	PerlUnicodeLineBreak
-	PerlYAMLTiny
-	Pixman
-	PkgConfig
-	Procps
-	Python
-	PythonFlitCore
-	PythonHatchling
-	PythonIniConfig
-	PythonMako
-	PythonMarkupSafe
-	PythonPackaging
-	PythonPathspec
-	PythonPluggy
-	PythonPyTest
-	PythonPyYAML
-	PythonPycparser
-	PythonPygments
-	PythonSetuptools
-	PythonSetuptoolsSCM
-	PythonTroveClassifiers
-	PythonVCSVersioning
-	PythonWheel
-	QEMU
-	Rdfind
-	Readline
-	Rsync
-	Sed
-	SPIRVHeaders
-	SPIRVLLVMTranslator
-	SPIRVTools
-	SquashfsTools
-	Strace
-	TamaGo
-	Tar
-	Texinfo
-	Toybox
-	toyboxEarly
-	Unzip
-	UtilLinux
-	VIM
-	Wayland
-	WaylandProtocols
-	XCB
-	XCBProto
-	XDGDBusProxy
-	XZ
-	Xkbcomp
-	XkeyboardConfig
-	XorgProto
-	Xserver
-	Zlib
-	Zstd
-
-	// PresetUnexportedStart is the first unexported preset.
-	PresetUnexportedStart
-
-	stage0Dist = iota - 1
-	llvmSource
-	// earlyCompilerRT is an early, standalone compiler-rt installation for the
-	// standalone runtimes build.
-	//
-	// earlyCompilerRT must only be loaded by [LLVM].
-	earlyCompilerRT
-	// earlyRuntimes is an early, standalone installation of LLVM runtimes to
-	// work around the cmake build system leaking the system LLVM installation
-	// when invoking the newly built toolchain.
-	//
-	// earlyRuntimes must only be loaded by [LLVM].
-	earlyRuntimes
-
-	buildcatrust
-	utilMacros
-
-	// Musl is a standalone libc that does not depend on the toolchain.
-	Musl
-	// muslHeaders is a system installation of [Musl] headers.
-	muslHeaders
-
-	// gcc is a hacked-to-pieces GCC toolchain meant for use in intermediate
-	// stages only. This preset and its direct output must never be exposed.
-	gcc
-
-	// nettle3 is an older version of [Nettle].
-	nettle3
-
-	// Stage0 is a tarball containing all compile-time dependencies of artifacts
-	// part of the [Std] toolchain.
-	Stage0
-
-	// PresetEnd is the total number of presets and does not denote a preset.
-	PresetEnd
-)
-
-// P represents multiple [PArtifact] and is stable through JSON.
-type P []PArtifact
-
-// MarshalJSON represents [PArtifact] by their [Metadata.Name].
-func (s P) MarshalJSON() ([]byte, error) {
-	names := make([]string, len(s))
-	for i, p := range s {
-		names[i] = GetMetadata(p).Name
-	}
-	return json.Marshal(names)
-}
-
-// UnmarshalJSON resolves the value created by MarshalJSON back to [P].
-func (s *P) UnmarshalJSON(data []byte) error {
-	var names []string
-	if err := json.Unmarshal(data, &names); err != nil {
-		return err
-	}
-
-	*s = make(P, len(names))
-	for i, name := range names {
-		if p, ok := ResolveName(name); !ok {
-			return fmt.Errorf("unknown artifact %q", name)
-		} else {
-			(*s)[i] = p
-		}
-	}
-	return nil
-}
-
-// Metadata is stage-agnostic information of a [PArtifact] not directly
-// representable in the resulting [pkg.Artifact].
-type Metadata struct {
-	f func(t Toolchain) (a pkg.Artifact, version string)
-
-	// Unique package name.
-	Name string `json:"name"`
-	// Short user-facing description.
-	Description string `json:"description"`
-	// Project home page.
-	Website string `json:"website,omitempty"`
-
-	// Runtime dependencies.
-	Dependencies P `json:"dependencies"`
-
-	// Project identifier on [Anitya].
-	//
-	// [Anitya]: https://release-monitoring.org/
-	ID int `json:"-"`
-
-	// Optional custom version checking behaviour.
-	latest func(v *Versions) string
-}
-
-// GetLatest returns the latest version described by v.
-func (meta *Metadata) GetLatest(v *Versions) string {
-	if meta.latest != nil {
-		return meta.latest(v)
-	}
-	return v.Latest
-}
-
-// Unversioned denotes an unversioned [PArtifact].
-const Unversioned = "\x00"
-
-// UnpopulatedIDError is returned by [Metadata.GetLatest] for an instance of
-// [Metadata] where ID is not populated.
-type UnpopulatedIDError struct{}
-
-func (UnpopulatedIDError) Unwrap() error { return errors.ErrUnsupported }
-func (UnpopulatedIDError) Error() string { return "Anitya ID is not populated" }
-
-// Versions are package versions returned by Anitya.
-type Versions struct {
-	// The latest version for the project, as determined by the version sorting algorithm.
-	Latest string `json:"latest_version"`
-	// List of all versions that aren’t flagged as pre-release.
-	Stable []string `json:"stable_versions"`
-	// List of all versions stored, sorted from newest to oldest.
-	All []string `json:"versions"`
-}
-
-// getStable returns the first Stable version, or Latest if that is unavailable.
-func (v *Versions) getStable() string {
-	if len(v.Stable) == 0 {
-		return v.Latest
-	}
-	return v.Stable[0]
-}
-
-// GetVersions returns versions fetched from Anitya.
-func (meta *Metadata) GetVersions(ctx context.Context) (*Versions, error) {
-	if meta.ID == 0 {
-		return nil, UnpopulatedIDError{}
-	}
-
-	var resp *http.Response
-	if req, err := http.NewRequestWithContext(
-		ctx,
-		http.MethodGet,
-		"https://release-monitoring.org/api/v2/versions/?project_id="+
-			strconv.Itoa(meta.ID),
-		nil,
-	); err != nil {
-		return nil, err
-	} else {
-		req.Header.Set("User-Agent", "Rosa/1.1")
-		if resp, err = http.DefaultClient.Do(req); err != nil {
-			return nil, err
-		}
-	}
-
-	var v Versions
-	err := json.NewDecoder(resp.Body).Decode(&v)
-	return &v, errors.Join(err, resp.Body.Close())
-}
-
-var (
-	// artifactsM is an array of [PArtifact] metadata.
-	artifactsM [PresetEnd]Metadata
-
-	// artifacts stores the result of Metadata.f.
-	artifacts [_toolchainEnd][len(artifactsM)]struct {
-		a pkg.Artifact
-		v string
-	}
-	// artifactsOnce is for lazy initialisation of artifacts.
-	artifactsOnce [_toolchainEnd][len(artifactsM)]sync.Once
-
-	// arch is the target architecture.
-	arch = runtime.GOARCH
-
-	// presetOpts globally modifies behaviour of presets.
-	presetOpts int
-)
-
-const (
-	// OptSkipCheck skips running all test suites.
-	OptSkipCheck = 1 << iota
-	// OptLLVMNoLTO disables LTO in all [LLVM] stages.
-	OptLLVMNoLTO
-)
-
-// Arch returns the target architecture.
-func Arch() string { return arch }
-
-// Flags returns the current preset flags
-func Flags() int { return presetOpts }
-
-// zero zeros the value pointed to by p.
-func zero[T any](p *T) { var v T; *p = v }
-
-// DropCaches arranges for all cached [pkg.Artifact] to be freed some time after
-// it returns. Must not be used concurrently with any other function from this
-// package.
-func DropCaches(targetArch string, flags int) {
-	if targetArch == "" {
-		targetArch = runtime.GOARCH
-	}
-
-	arch = targetArch
-	presetOpts = flags
-	zero(&artifacts)
-	zero(&artifactsOnce)
-}
-
-// GetMetadata returns [Metadata] of a [PArtifact].
-func GetMetadata(p PArtifact) *Metadata { return &artifactsM[p] }
-
-// construct constructs a [pkg.Artifact] corresponding to a [PArtifact] once.
-func (t Toolchain) construct(p PArtifact) {
-	artifactsOnce[t][p].Do(func() {
-		artifacts[t][p].a, artifacts[t][p].v = artifactsM[p].f(t)
-	})
-}
-
-// Load returns the resulting [pkg.Artifact] of [PArtifact].
-func (t Toolchain) Load(p PArtifact) pkg.Artifact {
-	t.construct(p)
-	return artifacts[t][p].a
-}
-
-// Version returns the version string of [PArtifact].
-func (t Toolchain) Version(p PArtifact) string {
-	t.construct(p)
-	return artifacts[t][p].v
-}
-
-// ResolveName returns a [PArtifact] by name.
-func ResolveName(name string) (p PArtifact, ok bool) {
-	for i := range PresetUnexportedStart {
-		if name == artifactsM[i].Name {
-			return i, true
-		}
-	}
-	return 0, false
-}
--- a/internal/rosa/all_test.go
+++ b/internal/rosa/all_test.go
@@ -1,81 +0,0 @@
-package rosa_test
-
-import (
-	"testing"
-
-	"hakurei.app/internal/rosa"
-)
-
-func TestLoad(t *testing.T) {
-	t.Parallel()
-
-	for i := range rosa.PresetEnd {
-		p := rosa.PArtifact(i)
-		t.Run(rosa.GetMetadata(p).Name, func(t *testing.T) {
-			t.Parallel()
-
-			rosa.Std.Load(p)
-		})
-	}
-}
-
-func BenchmarkAll(b *testing.B) {
-	arch, flags := rosa.Arch(), rosa.Flags()
-	b.Cleanup(func() { rosa.DropCaches(arch, flags) })
-
-	for b.Loop() {
-		for i := range rosa.PresetEnd {
-			rosa.Std.Load(rosa.PArtifact(i))
-		}
-
-		b.StopTimer()
-		rosa.DropCaches("", 0)
-		b.StartTimer()
-	}
-}
-
-func TestResolveName(t *testing.T) {
-	t.Parallel()
-
-	for i := range rosa.PresetUnexportedStart {
-		p := i
-		name := rosa.GetMetadata(p).Name
-		t.Run(name, func(t *testing.T) {
-			t.Parallel()
-
-			if got, ok := rosa.ResolveName(name); !ok {
-				t.Fatal("ResolveName: ok = false")
-			} else if got != p {
-				t.Fatalf("ResolveName: %d, want %d", got, p)
-			}
-		})
-	}
-}
-func TestResolveNameUnexported(t *testing.T) {
-	t.Parallel()
-
-	for i := rosa.PresetUnexportedStart; i < rosa.PresetEnd; i++ {
-		p := i
-		name := rosa.GetMetadata(p).Name
-		t.Run(name, func(t *testing.T) {
-			t.Parallel()
-
-			if got, ok := rosa.ResolveName(name); ok {
-				t.Fatalf("ResolveName: resolved unexported preset %d", got)
-			}
-		})
-	}
-}
-
-func TestUnique(t *testing.T) {
-	t.Parallel()
-
-	names := make(map[string]struct{})
-	for i := range rosa.PresetEnd {
-		name := rosa.GetMetadata(rosa.PArtifact(i)).Name
-		if _, ok := names[name]; ok {
-			t.Fatalf("name %s is not unique", name)
-		}
-		names[name] = struct{}{}
-	}
-}
--- a/internal/rosa/argp-standalone.go
+++ b/internal/rosa/argp-standalone.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newArgpStandalone() (pkg.Artifact, string) {
+func (t Toolchain) newArgpStandalone(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.3"
 		checksum = "vtW0VyO2pJ-hPyYmDI2zwSLS8QL0sPAUKC1t3zNYbwN2TmsaE-fADhaVtNd3eNFl"
 	)
-	return t.NewPackage("argp-standalone", version, newTar(
+	return s.NewPackage(t, "argp-standalone", version, newTar(
 		"http://www.lysator.liu.se/~nisse/misc/"+
 			"argp-standalone-"+version+".tar.gz",
 		checksum,
@@ -26,11 +26,11 @@ install -D -m755 libargp.a /work/system/lib/libargp.a
 	), version
 }
 func init() {
-	artifactsM[ArgpStandalone] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newArgpStandalone,

 		Name:        "argp-standalone",
 		Description: "hierarchical argument parsing library broken out from glibc",
 		Website:     "http://www.lysator.liu.se/~nisse/misc/",
-	}
+	})
 }
--- a/internal/rosa/busybox.go
+++ b/internal/rosa/busybox.go
@@ -85,13 +85,13 @@ func (a busyboxBin) Cure(t *pkg.TContext) (err error) {

 // newBusyboxBin returns a [pkg.Artifact] containing a busybox installation from
 // the https://busybox.net/downloads/binaries/ binary release.
-func newBusyboxBin() pkg.Artifact {
+func (s *S) newBusyboxBin() pkg.Artifact {
 	var version, url, checksum string
-	switch arch {
+	switch s.arch {
 	case "amd64":
 		version = "1.35.0"
 		url = "https://busybox.net/downloads/binaries/" +
-			version + "-" + linuxArch() + "-linux-musl/busybox"
+			version + "-" + s.linuxArch() + "-linux-musl/busybox"
 		checksum = "L7OBIsPu9enNHn7FqpBT1kOg_mCLNmetSeNMA3i4Y60Z5jTgnlX3qX3zcQtLx5AB"
 	case "arm64":
 		version = "1.31.0"
@@ -100,11 +100,11 @@ func newBusyboxBin() pkg.Artifact {
 		checksum = "npJjBO7iwhjW6Kx2aXeSxf8kXhVgTCDChOZTTsI8ZfFfa3tbsklxRiidZQdrVERg"

 	default:
-		panic("unsupported target " + arch)
+		panic("unsupported target " + s.arch)
 	}

 	return pkg.NewExec(
-		"busybox-bin-"+version, arch, nil, pkg.ExecTimeoutMax, false, false,
+		"busybox-bin-"+version, s.arch, nil, pkg.ExecTimeoutMax, false, false,
 		fhs.AbsRoot, []string{
 			"PATH=/system/bin",
 		},
--- a/internal/rosa/bzip2.go
+++ b/internal/rosa/bzip2.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newBzip2() (pkg.Artifact, string) {
+func (t Toolchain) newBzip2(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.0.8"
 		checksum = "cTLykcco7boom-s05H1JVsQi1AtChYL84nXkg_92Dm1Xt94Ob_qlMg_-NSguIK-c"
 	)
-	return t.NewPackage("bzip2", version, newTar(
+	return s.NewPackage(t, "bzip2", version, newTar(
 		"https://sourceware.org/pub/bzip2/bzip2-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -26,7 +26,7 @@ func (t Toolchain) newBzip2() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Bzip2] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newBzip2,

 		Name:        "bzip2",
@@ -34,5 +34,5 @@ func init() {
 		Website:     "https://sourceware.org/bzip2/",

 		ID: 237,
-	}
+	})
 }
--- a/internal/rosa/cmake.go
+++ b/internal/rosa/cmake.go
@@ -8,12 +8,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newCMake() (pkg.Artifact, string) {
+func (t Toolchain) newCMake(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.3.2"
 		checksum = "6QylwRVKletndTSkZTV2YBRwgd_9rUVgav_QW23HpjUgV21AVYZOUOal8tdBDmO7"
 	)
-	return t.NewPackage("cmake", version, newFromGitHubRelease(
+	return s.NewPackage(t, "cmake", version, newFromGitHubRelease(
 		"Kitware/CMake",
 		"v"+version,
 		"cmake-"+version+".tar.gz",
@@ -106,7 +106,7 @@ index 2ead810437..f85cbb8b1c 100644
 	), version
 }
 func init() {
-	artifactsM[CMake] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newCMake,

 		Name:        "cmake",
@@ -114,7 +114,7 @@ func init() {
 		Website:     "https://cmake.org/",

 		ID: 306,
-	}
+	})
 }

 // CMakeHelper is the [CMake] build system helper.
@@ -164,7 +164,7 @@ func (*CMakeHelper) createDir() bool { return true }
 func (*CMakeHelper) wantsDir() string { return "/cure/" }

 // script generates the cure script.
-func (attr *CMakeHelper) script(name string) string {
+func (attr *CMakeHelper) script(s *S, name string) string {
 	if attr == nil {
 		attr = new(CMakeHelper)
 	}
@@ -180,7 +180,7 @@ func (attr *CMakeHelper) script(name string) string {
 	}

 	script := attr.Script
-	if !attr.SkipTest && presetOpts&OptSkipCheck == 0 {
+	if !attr.SkipTest && s.opts&OptSkipCheck == 0 {
 		script += "\n" + test
 	}

--- a/internal/rosa/connman.go
+++ b/internal/rosa/connman.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newConnman() (pkg.Artifact, string) {
+func (t Toolchain) newConnman(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.0"
 		checksum = "MhVTdJOhndnZn2SWd8URKo_Pj7Zvc14tntEbrVOf9L3yVWJvpb3v3Q6104tWJgtW"
 	)
-	return t.NewPackage("connman", version, newTar(
+	return s.NewPackage(t, "connman", version, newTar(
 		"https://git.kernel.org/pub/scm/network/connman/connman.git/"+
 			"snapshot/connman-"+version+".tar.gz",
 		checksum,
@@ -90,7 +90,7 @@ func (t Toolchain) newConnman() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Connman] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newConnman,

 		Name:        "connman",
@@ -105,5 +105,5 @@ func init() {
 		},

 		ID: 337,
-	}
+	})
 }
--- a/internal/rosa/curl.go
+++ b/internal/rosa/curl.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newCurl() (pkg.Artifact, string) {
+func (t Toolchain) newCurl(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "8.20.0"
 		checksum = "xyHXwrngIRGMasuzhn-I5MSCOhktwINbsWt1f_LuR-5jRVvyx_g6U1EQfDLEbr9r"
 	)
-	return t.NewPackage("curl", version, newTar(
+	return s.NewPackage(t, "curl", version, newTar(
 		"https://curl.se/download/curl-"+version+".tar.bz2",
 		checksum,
 		pkg.TarBzip2,
@@ -39,7 +39,7 @@ chmod +w tests/data && rm -f tests/data/test459
 	), version
 }
 func init() {
-	artifactsM[Curl] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newCurl,

 		Name:        "curl",
@@ -52,5 +52,5 @@ func init() {
 		},

 		ID: 381,
-	}
+	})
 }
--- a/internal/rosa/dbus.go
+++ b/internal/rosa/dbus.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newDBus() (pkg.Artifact, string) {
+func (t Toolchain) newDBus(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.16.2"
 		checksum = "INwOuNdrDG7XW5ilW_vn8JSxEa444rRNc5ho97i84I1CNF09OmcFcV-gzbF4uCyg"
 	)
-	return t.NewPackage("dbus", version, newFromGitLab(
+	return s.NewPackage(t, "dbus", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"dbus/dbus",
 		"dbus-"+version,
@@ -29,7 +29,7 @@ func (t Toolchain) newDBus() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[DBus] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newDBus,

 		Name:        "dbus",
@@ -42,15 +42,15 @@ func init() {
 		},

 		ID: 5356,
-	}
+	})
 }

-func (t Toolchain) newXDGDBusProxy() (pkg.Artifact, string) {
+func (t Toolchain) newXDGDBusProxy(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.1.7"
 		checksum = "UW5Pe-TP-XAaN-kTbxrkOQ7eYdmlAQlr2pdreLtPT0uwdAz-7rzDP8V_8PWuZBup"
 	)
-	return t.NewPackage("xdg-dbus-proxy", version, newFromGitHub(
+	return s.NewPackage(t, "xdg-dbus-proxy", version, newFromGitHub(
 		"flatpak/xdg-dbus-proxy",
 		version,
 		checksum,
@@ -65,7 +65,7 @@ func (t Toolchain) newXDGDBusProxy() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[XDGDBusProxy] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXDGDBusProxy,

 		Name:        "xdg-dbus-proxy",
@@ -77,5 +77,5 @@ func init() {
 		},

 		ID: 58434,
-	}
+	})
 }
--- a/internal/rosa/dtc.go
+++ b/internal/rosa/dtc.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newDTC() (pkg.Artifact, string) {
+func (t Toolchain) newDTC(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.7.2"
 		checksum = "vUoiRynPyYRexTpS6USweT5p4SVHvvVJs8uqFkkVD-YnFjwf6v3elQ0-Etrh00Dt"
 	)
-	return t.NewPackage("dtc", version, newTar(
+	return s.NewPackage(t, "dtc", version, newTar(
 		"https://git.kernel.org/pub/scm/utils/dtc/dtc.git/snapshot/"+
 			"dtc-v"+version+".tar.gz",
 		checksum,
@@ -31,7 +31,7 @@ func (t Toolchain) newDTC() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[DTC] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newDTC,

 		Name:        "dtc",
@@ -39,5 +39,5 @@ func init() {
 		Website:     "https://git.kernel.org/pub/scm/utils/dtc/dtc.git/",

 		ID: 16911,
-	}
+	})
 }
--- a/internal/rosa/elfutils.go
+++ b/internal/rosa/elfutils.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newElfutils() (pkg.Artifact, string) {
+func (t Toolchain) newElfutils(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.195"
 		checksum = "JrGnBD38w8Mj0ZxDw3fKlRBFcLvRKu8rcYnX35R9yTlUSYnzTazyLboG-a2CsJlu"
 	)
-	return t.NewPackage("elfutils", version, newTar(
+	return s.NewPackage(t, "elfutils", version, newTar(
 		"https://sourceware.org/elfutils/ftp/"+
 			version+"/elfutils-"+version+".tar.bz2",
 		checksum,
@@ -39,7 +39,7 @@ func (t Toolchain) newElfutils() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Elfutils] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newElfutils,

 		Name:        "elfutils",
@@ -55,5 +55,5 @@ func init() {
 		},

 		ID: 5679,
-	}
+	})
 }
--- a/internal/rosa/fakeroot.go
+++ b/internal/rosa/fakeroot.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newFakeroot() (pkg.Artifact, string) {
+func (t Toolchain) newFakeroot(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.37.2"
 		checksum = "4ve-eDqVspzQ6VWDhPS0NjW3aSenBJcPAJq_BFT7OOFgUdrQzoTBxZWipDAGWxF8"
 	)
-	return t.NewPackage("fakeroot", version, newFromGitLab(
+	return s.NewPackage(t, "fakeroot", version, newFromGitLab(
 		"salsa.debian.org",
 		"clint/fakeroot",
 		"upstream/"+version,
@@ -46,7 +46,7 @@ index f135ad9..85c784c 100644
 	), version
 }
 func init() {
-	artifactsM[Fakeroot] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newFakeroot,

 		Name:        "fakeroot",
@@ -54,5 +54,5 @@ func init() {
 		Website:     "https://salsa.debian.org/clint/fakeroot",

 		ID: 12048,
-	}
+	})
 }
--- a/internal/rosa/flex.go
+++ b/internal/rosa/flex.go
@@ -4,12 +4,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newFlex() (pkg.Artifact, string) {
+func (t Toolchain) newFlex(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.6.4"
 		checksum = "p9POjQU7VhgOf3x5iFro8fjhy0NOanvA7CTeuWS_veSNgCixIJshTrWVkc5XLZkB"
 	)
-	return t.NewPackage("flex", version, newFromGitHubRelease(
+	return s.NewPackage(t, "flex", version, newFromGitHubRelease(
 		"westes/flex",
 		"v"+version,
 		"flex-"+version+".tar.gz",
@@ -20,7 +20,7 @@ func (t Toolchain) newFlex() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Flex] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newFlex,

 		Name:        "flex",
@@ -28,5 +28,5 @@ func init() {
 		Website:     "https://github.com/westes/flex/",

 		ID: 819,
-	}
+	})
 }
--- a/internal/rosa/freetype.go
+++ b/internal/rosa/freetype.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newFreetype() (pkg.Artifact, string) {
+func (t Toolchain) newFreetype(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.14.3"
 		checksum = "-WfLv8fVJNyCHpP_lriiDzOcVbBL9ajdQ3tl8AzIIUa9-8sVpU9irxOmSMgRHWYz"
 	)
-	return t.NewPackage("freetype", version, newTar(
+	return s.NewPackage(t, "freetype", version, newTar(
 		"https://download.savannah.gnu.org/releases/freetype/"+
 			"freetype-"+version+".tar.gz",
 		checksum,
@@ -15,7 +15,7 @@ func (t Toolchain) newFreetype() (pkg.Artifact, string) {
 	), nil, (*MakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Freetype] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newFreetype,

 		Name:        "freetype",
@@ -23,5 +23,5 @@ func init() {
 		Website:     "http://www.freetype.org/",

 		ID: 854,
-	}
+	})
 }
--- a/internal/rosa/fuse.go
+++ b/internal/rosa/fuse.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newFuse() (pkg.Artifact, string) {
+func (t Toolchain) newFuse(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.18.2"
 		checksum = "iL-7b7eUtmlVSf5cSq0dzow3UiqSjBmzV3cI_ENPs1tXcHdktkG45j1V12h-4jZe"
 	)
-	return t.NewPackage("fuse", version, newFromGitHubRelease(
+	return s.NewPackage(t, "fuse", version, newFromGitHubRelease(
 		"libfuse/libfuse",
 		"fuse-"+version,
 		"fuse-"+version+".tar.gz",
@@ -31,7 +31,7 @@ func (t Toolchain) newFuse() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Fuse] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newFuse,

 		Name:        "fuse",
@@ -39,5 +39,5 @@ func init() {
 		Website:     "https://github.com/libfuse/libfuse/",

 		ID: 861,
-	}
+	})
 }
--- a/internal/rosa/git.go
+++ b/internal/rosa/git.go
@@ -7,12 +7,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newGit() (pkg.Artifact, string) {
+func (t Toolchain) newGit(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.54.0"
 		checksum = "7vGKtFOJGqY8DO4e8UMRax7dLgImXKQz5MMalec6MlgYrsarffSJjgOughwRFpSH"
 	)
-	return t.NewPackage("git", version, newTar(
+	return s.NewPackage(t, "git", version, newTar(
 		"https://www.kernel.org/pub/software/scm/git/"+
 			"git-"+version+".tar.gz",
 		checksum,
@@ -88,7 +88,7 @@ disable_test t5515-fetch-merge-logic
 	), version
 }
 func init() {
-	artifactsM[Git] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGit,

 		Name:        "git",
@@ -102,18 +102,19 @@ func init() {
 		},

 		ID: 5350,
-	}
+	})
 }

 // NewViaGit returns a [pkg.Artifact] for cloning a git repository.
-func (t Toolchain) NewViaGit(
+func (s *S) NewViaGit(
+	t Toolchain,
 	url, rev string,
 	checksum pkg.Checksum,
 ) pkg.Artifact {
-	return t.New(strings.TrimSuffix(
+	return s.New(t, strings.TrimSuffix(
 		path.Base(url),
 		".git",
-	)+"-src-"+path.Base(rev), THostNet, t.AppendPresets(nil,
+	)+"-src-"+path.Base(rev), THostNet, s.AppendPresets(t, nil,
 		NSSCACert,
 		Git,
 	), &checksum, nil, `
@@ -131,6 +132,6 @@ rm -rf /work/.git
 }

 // newTagRemote is a helper around NewViaGit for a tag on a git remote.
-func (t Toolchain) newTagRemote(url, tag, checksum string) pkg.Artifact {
-	return t.NewViaGit(url, "refs/tags/"+tag, mustDecode(checksum))
+func (s *S) newTagRemote(t Toolchain, url, tag, checksum string) pkg.Artifact {
+	return s.NewViaGit(t, url, "refs/tags/"+tag, mustDecode(checksum))
 }
--- a/internal/rosa/glslang.go
+++ b/internal/rosa/glslang.go
@@ -7,12 +7,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newSPIRVHeaders() (pkg.Artifact, string) {
+func (t Toolchain) newSPIRVHeaders(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.4.341.0"
 		checksum = "0PL43-19Iaw4k7_D8J8BvoJ-iLgCVSYZ2ThgDPGfAJwIJFtre7l0cnQtLjcY-JvD"
 	)
-	return t.NewPackage("spirv-headers", version, newFromGitHub(
+	return s.NewPackage(t, "spirv-headers", version, newFromGitHub(
 		"KhronosGroup/SPIRV-Headers",
 		"vulkan-sdk-"+version,
 		checksum,
@@ -22,7 +22,7 @@ func (t Toolchain) newSPIRVHeaders() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[SPIRVHeaders] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newSPIRVHeaders,

 		Name:        "spirv-headers",
@@ -49,15 +49,15 @@ func init() {
 			}
 			return v.Latest
 		},
-	}
+	})
 }

-func (t Toolchain) newSPIRVTools() (pkg.Artifact, string) {
+func (t Toolchain) newSPIRVTools(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2026.1"
 		checksum = "ZSQPQx8NltCDzQLk4qlaVxyWRWeI_JtsjEpeFt3kezTanl9DTHfLixSUCezMFBjv"
 	)
-	return t.NewPackage("spirv-tools", version, newFromGitHub(
+	return s.NewPackage(t, "spirv-tools", version, newFromGitHub(
 		"KhronosGroup/SPIRV-Tools",
 		"v"+version,
 		checksum,
@@ -72,7 +72,7 @@ func (t Toolchain) newSPIRVTools() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[SPIRVTools] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newSPIRVTools,

 		Name:        "spirv-tools",
@@ -86,15 +86,15 @@ func init() {
 		ID: 14894,

 		latest: (*Versions).getStable,
-	}
+	})
 }

-func (t Toolchain) newGlslang() (pkg.Artifact, string) {
+func (t Toolchain) newGlslang(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "16.3.0"
 		checksum = "xyqDf8k3-D0_BXHGi0uLgMglnJ05Rf3j73QgbDs3sGtKNdBIQhY8JfqX1NcNoJQN"
 	)
-	return t.NewPackage("glslang", version, newFromGitHub(
+	return s.NewPackage(t, "glslang", version, newFromGitHub(
 		"KhronosGroup/glslang",
 		version,
 		checksum,
@@ -116,7 +116,7 @@ func (t Toolchain) newGlslang() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Glslang] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGlslang,

 		Name:        "glslang",
@@ -124,10 +124,10 @@ func init() {
 		Website:     "https://github.com/KhronosGroup/glslang",

 		ID: 205796,
-	}
+	})
 }

-func (t Toolchain) newSPIRVLLVMTranslator() (pkg.Artifact, string) {
+func (t Toolchain) newSPIRVLLVMTranslator(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "22.1.2"
 		checksum = "JZAaV5ewYcm-35YA_U2BM2IcsQouZtX1BLZR0zh2vSlfEXMsT5OCtY4Gh5RJkcGy"
@@ -137,7 +137,7 @@ func (t Toolchain) newSPIRVLLVMTranslator() (pkg.Artifact, string) {
 		"cooperative_matrix_constant_null.spvasm",
 	}

-	switch arch {
+	switch s.arch {
 	case "arm64":
 		skipChecks = append(skipChecks,
 			// LLVM ERROR: unsupported calling convention
@@ -183,7 +183,7 @@ func (t Toolchain) newSPIRVLLVMTranslator() (pkg.Artifact, string) {
 		)
 	}

-	return t.NewPackage("spirv-llvm-translator", version, newFromGitHub(
+	return s.NewPackage(t, "spirv-llvm-translator", version, newFromGitHub(
 		"KhronosGroup/SPIRV-LLVM-Translator",
 		"v"+version, checksum,
 	), &PackageAttr{
@@ -232,7 +232,7 @@ export LIT_OPTS=` + litArgs(true, skipChecks...) + `
 	), version
 }
 func init() {
-	artifactsM[SPIRVLLVMTranslator] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newSPIRVLLVMTranslator,

 		Name:        "spirv-llvm-translator",
@@ -244,5 +244,5 @@ func init() {
 		},

 		ID: 227273,
-	}
+	})
 }
--- a/internal/rosa/gnu.go
+++ b/internal/rosa/gnu.go
@@ -42,12 +42,12 @@ func skipGNUTests(tests ...int) string {
 	return buf.String()
 }

-func (t Toolchain) newM4() (pkg.Artifact, string) {
+func (t Toolchain) newM4(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.4.21"
 		checksum = "pPa6YOo722Jw80l1OsH1tnUaklnPFjFT-bxGw5iAVrZTm1P8FQaWao_NXop46-pm"
 	)
-	return t.NewPackage("m4", version, newTar(
+	return s.NewPackage(t, "m4", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/m4/m4-"+version+".tar.bz2",
 		checksum,
 		pkg.TarBzip2,
@@ -63,7 +63,7 @@ chmod +w tests/test-c32ispunct.sh && echo '#!/bin/sh' > tests/test-c32ispunct.sh
 	), version
 }
 func init() {
-	artifactsM[M4] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newM4,

 		Name:        "m4",
@@ -71,15 +71,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/m4/",

 		ID: 1871,
-	}
+	})
 }

-func (t Toolchain) newBison() (pkg.Artifact, string) {
+func (t Toolchain) newBison(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.8.2"
 		checksum = "BhRM6K7URj1LNOkIDCFDctSErLS-Xo5d9ba9seg10o6ACrgC1uNhED7CQPgIY29Y"
 	)
-	return t.NewPackage("bison", version, newTar(
+	return s.NewPackage(t, "bison", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/bison/bison-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -98,7 +98,7 @@ func (t Toolchain) newBison() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Bison] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newBison,

 		Name:        "bison",
@@ -106,15 +106,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/bison/",

 		ID: 193,
-	}
+	})
 }

-func (t Toolchain) newSed() (pkg.Artifact, string) {
+func (t Toolchain) newSed(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.10"
 		checksum = "TXTRFQJCyflb-bpBRI2S5Y1DpplwvT7-KfXtpqN4AdZgZ5OtI6yStn1-bkhDKx51"
 	)
-	return t.NewPackage("sed", version, newTar(
+	return s.NewPackage(t, "sed", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/sed/sed-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -125,7 +125,7 @@ func (t Toolchain) newSed() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Sed] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newSed,

 		Name:        "sed",
@@ -133,15 +133,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/sed/",

 		ID: 4789,
-	}
+	})
 }

-func (t Toolchain) newAutoconf() (pkg.Artifact, string) {
+func (t Toolchain) newAutoconf(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.73"
 		checksum = "yGabDTeOfaCUB0JX-h3REYLYzMzvpDwFmFFzHNR7QilChCUNE4hR6q7nma4viDYg"
 	)
-	return t.NewPackage("autoconf", version, newTar(
+	return s.NewPackage(t, "autoconf", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/autoconf/autoconf-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -160,7 +160,7 @@ func (t Toolchain) newAutoconf() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Autoconf] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newAutoconf,

 		Name:        "autoconf",
@@ -173,15 +173,15 @@ func init() {
 		},

 		ID: 141,
-	}
+	})
 }

-func (t Toolchain) newAutomake() (pkg.Artifact, string) {
+func (t Toolchain) newAutomake(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.18.1"
 		checksum = "FjvLG_GdQP7cThTZJLDMxYpRcKdpAVG-YDs1Fj1yaHlSdh_Kx6nRGN14E0r_BjcG"
 	)
-	return t.NewPackage("automake", version, newTar(
+	return s.NewPackage(t, "automake", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/automake/automake-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -205,7 +205,7 @@ test_disable '#!/bin/sh' t/pr9.sh
 	), version
 }
 func init() {
-	artifactsM[Automake] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newAutomake,

 		Name:        "automake",
@@ -217,15 +217,15 @@ func init() {
 		},

 		ID: 144,
-	}
+	})
 }

-func (t Toolchain) newLibtool() (pkg.Artifact, string) {
+func (t Toolchain) newLibtool(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.5.4"
 		checksum = "pa6LSrQggh8mSJHQfwGjysAApmZlGJt8wif2cCLzqAAa2jpsTY0jZ-6stS3BWZ2Q"
 	)
-	return t.NewPackage("libtool", version, newTar(
+	return s.NewPackage(t, "libtool", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/libtool/libtool-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -243,7 +243,7 @@ func (t Toolchain) newLibtool() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libtool] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibtool,

 		Name:        "libtool",
@@ -251,15 +251,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/libtool/",

 		ID: 1741,
-	}
+	})
 }

-func (t Toolchain) newGzip() (pkg.Artifact, string) {
+func (t Toolchain) newGzip(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.14"
 		checksum = "NWhjUavnNfTDFkZJyAUonL9aCOak8GVajWX2OMlzpFnuI0ErpBFyj88mz2xSjz0q"
 	)
-	return t.NewPackage("gzip", version, newTar(
+	return s.NewPackage(t, "gzip", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/gzip/gzip-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -269,7 +269,7 @@ func (t Toolchain) newGzip() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Gzip] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGzip,

 		Name:        "gzip",
@@ -277,15 +277,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/gzip/",

 		ID: 1290,
-	}
+	})
 }

-func (t Toolchain) newGettext() (pkg.Artifact, string) {
+func (t Toolchain) newGettext(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.0"
 		checksum = "3MasKeEdPeFEgWgzsBKk7JqWqql1wEMbgPmzAfs-mluyokoW0N8oQVxPQoOnSdgC"
 	)
-	return t.NewPackage("gettext", version, newTar(
+	return s.NewPackage(t, "gettext", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/gettext/gettext-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -315,7 +315,7 @@ touch gettext-tools/autotools/archive.dir.tar
 	), version
 }
 func init() {
-	artifactsM[Gettext] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGettext,

 		Name:        "gettext",
@@ -323,15 +323,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/gettext/",

 		ID: 898,
-	}
+	})
 }

-func (t Toolchain) newDiffutils() (pkg.Artifact, string) {
+func (t Toolchain) newDiffutils(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.12"
 		checksum = "9J5VAq5oA7eqwzS1Yvw-l3G5o-TccUrNQR3PvyB_lgdryOFAfxtvQfKfhdpquE44"
 	)
-	return t.NewPackage("diffutils", version, newTar(
+	return s.NewPackage(t, "diffutils", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/diffutils/diffutils-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -348,7 +348,7 @@ test_disable '#!/bin/sh' tests/cmp
 	}, (*MakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Diffutils] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newDiffutils,

 		Name:        "diffutils",
@@ -356,15 +356,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/diffutils/",

 		ID: 436,
-	}
+	})
 }

-func (t Toolchain) newPatch() (pkg.Artifact, string) {
+func (t Toolchain) newPatch(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.8"
 		checksum = "MA0BQc662i8QYBD-DdGgyyfTwaeALZ1K0yusV9rAmNiIsQdX-69YC4t9JEGXZkeR"
 	)
-	return t.NewPackage("patch", version, newTar(
+	return s.NewPackage(t, "patch", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/patch/patch-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -380,7 +380,7 @@ test_disable '#!/bin/sh' tests/need-filename
 	}, (*MakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Patch] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPatch,

 		Name:        "patch",
@@ -388,15 +388,15 @@ func init() {
 		Website:     "https://savannah.gnu.org/projects/patch/",

 		ID: 2597,
-	}
+	})
 }

-func (t Toolchain) newBash() (pkg.Artifact, string) {
+func (t Toolchain) newBash(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "5.3"
 		checksum = "4LQ_GRoB_ko-Ih8QPf_xRKA02xAm_TOxQgcJLmFDT6udUPxTAWrsj-ZNeuTusyDq"
 	)
-	return t.NewPackage("bash", version, newTar(
+	return s.NewPackage(t, "bash", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/bash/bash-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -410,7 +410,7 @@ func (t Toolchain) newBash() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Bash] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newBash,

 		Name:        "bash",
@@ -418,15 +418,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/bash/",

 		ID: 166,
-	}
+	})
 }

-func (t Toolchain) newCoreutils() (pkg.Artifact, string) {
+func (t Toolchain) newCoreutils(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "9.11"
 		checksum = "t8UMed5wpFEoC56aa42_yidfOAaRGzOfj7MRtQkkqgGbpXiskNA8bd-EmVSQkZie"
 	)
-	return t.NewPackage("coreutils", version, newTar(
+	return s.NewPackage(t, "coreutils", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/coreutils/coreutils-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -456,7 +456,7 @@ test_disable 'int main(){return 0;}' gnulib-tests/test-lchown.c
 	), version
 }
 func init() {
-	artifactsM[Coreutils] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newCoreutils,

 		Name:        "coreutils",
@@ -464,15 +464,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/coreutils/",

 		ID: 343,
-	}
+	})
 }

-func (t Toolchain) newTexinfo() (pkg.Artifact, string) {
+func (t Toolchain) newTexinfo(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "7.3"
 		checksum = "RRmC8Xwdof7JuZJeWGAQ_GeASIHAuJFQMbNONXBz5InooKIQGmqmWRjGNGEr5n4-"
 	)
-	return t.NewPackage("texinfo", version, newTar(
+	return s.NewPackage(t, "texinfo", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/texinfo/texinfo-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -484,7 +484,7 @@ func (t Toolchain) newTexinfo() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Texinfo] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newTexinfo,

 		Name:        "texinfo",
@@ -497,15 +497,15 @@ func init() {
 		},

 		ID: 4958,
-	}
+	})
 }

-func (t Toolchain) newGperf() (pkg.Artifact, string) {
+func (t Toolchain) newGperf(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.3"
 		checksum = "RtIy9pPb_Bb8-31J2Nw-rRGso2JlS-lDlVhuNYhqR7Nt4xM_nObznxAlBMnarJv7"
 	)
-	return t.NewPackage("gperf", version, newTar(
+	return s.NewPackage(t, "gperf", version, newTar(
 		"https://ftpmirror.gnu.org/gperf/gperf-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -514,7 +514,7 @@ func (t Toolchain) newGperf() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Gperf] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGperf,

 		Name:        "gperf",
@@ -522,15 +522,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/gperf/",

 		ID: 1237,
-	}
+	})
 }

-func (t Toolchain) newGawk() (pkg.Artifact, string) {
+func (t Toolchain) newGawk(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "5.4.0"
 		checksum = "m0RkIolC-PI7EY5q8pcx5Y-0twlIW0Yp3wXXmV-QaHorSdf8BhZ7kW9F8iWomz0C"
 	)
-	return t.NewPackage("gawk", version, newTar(
+	return s.NewPackage(t, "gawk", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/gawk/gawk-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -542,7 +542,7 @@ func (t Toolchain) newGawk() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Gawk] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGawk,

 		Name:        "gawk",
@@ -550,15 +550,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/gawk/",

 		ID: 868,
-	}
+	})
 }

-func (t Toolchain) newGrep() (pkg.Artifact, string) {
+func (t Toolchain) newGrep(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.12"
 		checksum = "qMB4RjaPNRRYsxix6YOrjE8gyAT1zVSTy4nW4wKW9fqa0CHYAuWgPwDTirENzm_1"
 	)
-	return t.NewPackage("grep", version, newTar(
+	return s.NewPackage(t, "grep", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/grep/grep-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -575,7 +575,7 @@ test_disable 'int main(){return 0;}' gnulib-tests/test-c32ispunct.c
 	), version
 }
 func init() {
-	artifactsM[Grep] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGrep,

 		Name:        "grep",
@@ -583,15 +583,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/grep/",

 		ID: 1251,
-	}
+	})
 }

-func (t Toolchain) newFindutils() (pkg.Artifact, string) {
+func (t Toolchain) newFindutils(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.10.0"
 		checksum = "ZXABdNBQXL7QjTygynRRTdXYWxQKZ0Wn5eMd3NUnxR0xaS0u0VfcKoTlbo50zxv6"
 	)
-	return t.NewPackage("findutils", version, pkg.NewHTTPGet(
+	return s.NewPackage(t, "findutils", version, pkg.NewHTTPGet(
 		nil, "https://ftpmirror.gnu.org/gnu/findutils/findutils-"+version+".tar.xz",
 		mustDecode(checksum),
 	), &PackageAttr{
@@ -606,7 +606,7 @@ echo 'int main(){return 0;}' > tests/xargs/test-sigusr.c
 	), version
 }
 func init() {
-	artifactsM[Findutils] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newFindutils,

 		Name:        "findutils",
@@ -614,15 +614,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/findutils/",

 		ID: 812,
-	}
+	})
 }

-func (t Toolchain) newBC() (pkg.Artifact, string) {
+func (t Toolchain) newBC(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.08.2"
 		checksum = "8h6f3hjV80XiFs6v9HOPF2KEyg1kuOgn5eeFdVspV05ODBVQss-ey5glc8AmneLy"
 	)
-	return t.NewPackage("bc", version, newTar(
+	return s.NewPackage(t, "bc", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/bc/bc-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -635,7 +635,7 @@ func (t Toolchain) newBC() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[BC] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newBC,

 		Name:        "bc",
@@ -643,22 +643,22 @@ func init() {
 		Website:     "https://www.gnu.org/software/bc/",

 		ID: 170,
-	}
+	})
 }

-func (t Toolchain) newLibiconv() (pkg.Artifact, string) {
+func (t Toolchain) newLibiconv(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.19"
 		checksum = "UibB6E23y4MksNqYmCCrA3zTFO6vJugD1DEDqqWYFZNuBsUWMVMcncb_5pPAr88x"
 	)
-	return t.NewPackage("libiconv", version, newTar(
+	return s.NewPackage(t, "libiconv", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/libiconv/libiconv-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Libiconv] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibiconv,

 		Name:        "libiconv",
@@ -666,15 +666,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/libiconv/",

 		ID: 10656,
-	}
+	})
 }

-func (t Toolchain) newTar() (pkg.Artifact, string) {
+func (t Toolchain) newTar(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.35"
 		checksum = "zSaoSlVUDW0dSfm4sbL4FrXLFR8U40Fh3zY5DWhR5NCIJ6GjU6Kc4VZo2-ZqpBRA"
 	)
-	return t.NewPackage("tar", version, newTar(
+	return s.NewPackage(t, "tar", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/tar/tar-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -700,7 +700,7 @@ func (t Toolchain) newTar() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Tar] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newTar,

 		Name:        "tar",
@@ -708,15 +708,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/tar/",

 		ID: 4939,
-	}
+	})
 }

-func (t Toolchain) newParallel() (pkg.Artifact, string) {
+func (t Toolchain) newParallel(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "20260422"
 		checksum = "eTsepxgqhXpMEhPd55qh-W5y4vjKn0x9TD2mzbJCNZYtFf4lT4Wzoqr74HGJYBEH"
 	)
-	return t.NewPackage("parallel", version, newTar(
+	return s.NewPackage(t, "parallel", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/parallel/parallel-"+version+".tar.bz2",
 		checksum,
 		pkg.TarBzip2,
@@ -730,7 +730,7 @@ ln -s ../system/bin/bash /bin/
 	), version
 }
 func init() {
-	artifactsM[Parallel] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newParallel,

 		Name:        "parallel",
@@ -742,15 +742,15 @@ func init() {
 		},

 		ID: 5448,
-	}
+	})
 }

-func (t Toolchain) newLibunistring() (pkg.Artifact, string) {
+func (t Toolchain) newLibunistring(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.4.2"
 		checksum = "iW9BbfLoVlXjWoLTZ4AekQSu4cFBnLcZ4W8OHWbv0AhJNgD3j65_zqaLMzFKylg2"
 	)
-	return t.NewPackage("libunistring", version, newTar(
+	return s.NewPackage(t, "libunistring", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/libunistring/libunistring-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -767,7 +767,7 @@ test_disable 'int main(){return 0;}' tests/test-c32ispunct.c
 	), version
 }
 func init() {
-	artifactsM[Libunistring] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibunistring,

 		Name:        "libunistring",
@@ -775,22 +775,22 @@ func init() {
 		Website:     "https://www.gnu.org/software/libunistring/",

 		ID: 1747,
-	}
+	})
 }

-func (t Toolchain) newLibtasn1() (pkg.Artifact, string) {
+func (t Toolchain) newLibtasn1(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.21.0"
 		checksum = "9DYI3UYbfYLy8JsKUcY6f0irskbfL0fHZA91Q-JEOA3kiUwpodyjemRsYRjUpjuq"
 	)
-	return t.NewPackage("libtasn1", version, newTar(
+	return s.NewPackage(t, "libtasn1", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/libtasn1/libtasn1-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Libtasn1] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibtasn1,

 		Name:        "libtasn1",
@@ -798,15 +798,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/libtasn1/",

 		ID: 1734,
-	}
+	})
 }

-func (t Toolchain) newReadline() (pkg.Artifact, string) {
+func (t Toolchain) newReadline(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "8.3"
 		checksum = "r-lcGRJq_MvvBpOq47Z2Y1OI2iqrmtcqhTLVXR0xWo37ZpC2uT_md7gKq5o_qTMV"
 	)
-	return t.NewPackage("readline", version, newTar(
+	return s.NewPackage(t, "readline", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/readline/readline-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -820,7 +820,7 @@ func (t Toolchain) newReadline() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Readline] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newReadline,

 		Name:        "readline",
@@ -832,24 +832,24 @@ func init() {
 		},

 		ID: 4173,
-	}
+	})
 }

-func (t Toolchain) newGnuTLS() (pkg.Artifact, string) {
+func (t Toolchain) newGnuTLS(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.8.12"
 		checksum = "VPdP-nRydQQRJcnma-YA7CJYA_kzTJ2rb3QFeP6D27emSyInJ8sQ-Wzn518I38dl"
 	)

 	var configureExtra []KV
-	switch arch {
+	switch s.arch {
 	case "arm64":
 		configureExtra = []KV{
 			{"disable-hardware-acceleration"},
 		}
 	}

-	return t.NewPackage("gnutls", version, t.newTagRemote(
+	return s.NewPackage(t, "gnutls", version, s.newTagRemote(t,
 		"https://gitlab.com/gnutls/gnutls.git",
 		version, checksum,
 	), &PackageAttr{
@@ -997,7 +997,7 @@ index 1b78b8cf1..350156a86 100644
 	), version
 }
 func init() {
-	artifactsM[GnuTLS] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGnuTLS,

 		Name:        "gnutls",
@@ -1013,15 +1013,15 @@ func init() {
 		},

 		ID: 1221,
-	}
+	})
 }

-func (t Toolchain) newBinutils() (pkg.Artifact, string) {
+func (t Toolchain) newBinutils(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.46.0"
 		checksum = "4kK1_EXQipxSqqyvwD4LbiMLFKCUApjq6PeG4XJP4dzxYGqDeqXfh8zLuTyOuOVR"
 	)
-	return t.NewPackage("binutils", version, newTar(
+	return s.NewPackage(t, "binutils", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/binutils/binutils-"+version+".tar.bz2",
 		checksum,
 		pkg.TarBzip2,
@@ -1030,7 +1030,7 @@ func (t Toolchain) newBinutils() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Binutils] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newBinutils,

 		Name:        "binutils",
@@ -1038,15 +1038,15 @@ func init() {
 		Website:     "https://www.gnu.org/software/binutils/",

 		ID: 7981,
-	}
+	})
 }

-func (t Toolchain) newGMP() (pkg.Artifact, string) {
+func (t Toolchain) newGMP(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "6.3.0"
 		checksum = "yrgbgEDWKDdMWVHh7gPbVl56-sRtVVhfvv0M_LX7xMUUk_mvZ1QOJEAnt7g4i3k5"
 	)
-	return t.NewPackage("gmp", version, newTar(
+	return s.NewPackage(t, "gmp", version, newTar(
 		"https://gcc.gnu.org/pub/gcc/infrastructure/"+
 			"gmp-"+version+".tar.bz2",
 		checksum,
@@ -1060,7 +1060,7 @@ func (t Toolchain) newGMP() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[GMP] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGMP,

 		Name:        "gmp",
@@ -1068,15 +1068,15 @@ func init() {
 		Website:     "https://gmplib.org/",

 		ID: 1186,
-	}
+	})
 }

-func (t Toolchain) newMPFR() (pkg.Artifact, string) {
+func (t Toolchain) newMPFR(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.2.2"
 		checksum = "wN3gx0zfIuCn9r3VAn_9bmfvAYILwrRfgBjYSD1IjLqyLrLojNN5vKyQuTE9kA-B"
 	)
-	return t.NewPackage("mpfr", version, newTar(
+	return s.NewPackage(t, "mpfr", version, newTar(
 		"https://gcc.gnu.org/pub/gcc/infrastructure/"+
 			"mpfr-"+version+".tar.bz2",
 		checksum,
@@ -1086,7 +1086,7 @@ func (t Toolchain) newMPFR() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[MPFR] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMPFR,

 		Name:        "mpfr",
@@ -1098,15 +1098,15 @@ func init() {
 		},

 		ID: 2019,
-	}
+	})
 }

-func (t Toolchain) newMPC() (pkg.Artifact, string) {
+func (t Toolchain) newMPC(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.4.1"
 		checksum = "ZffaZyWkvIw0iPvRe5EJ7O-VvHtSkbbb3K_7SgPtK810NvGan7nbF0T5-6tozjQN"
 	)
-	return t.NewPackage("mpc", version, newFromGitLab(
+	return s.NewPackage(t, "mpc", version, newFromGitLab(
 		"gitlab.inria.fr",
 		"mpc/mpc",
 		version, checksum,
@@ -1125,7 +1125,7 @@ func (t Toolchain) newMPC() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[MPC] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMPC,

 		Name:        "mpc",
@@ -1137,22 +1137,22 @@ func init() {
 		},

 		ID: 1667,
-	}
+	})
 }

-func (t Toolchain) newGCC() (pkg.Artifact, string) {
+func (t Toolchain) newGCC(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "16.1.0"
 		checksum = "4ASoWbxaA2FW7PAB0zzHDPC5XnNhyaAyjtDPpGzceSLeYnEIXsNYZR3PA_Zu5P0K"
 	)

 	var configureExtra []KV
-	switch arch {
+	switch s.arch {
 	case "amd64", "arm64":
 		configureExtra = append(configureExtra, KV{"with-multilib-list", "''"})
 	}

-	return t.NewPackage("gcc", version, newTar(
+	return s.NewPackage(t, "gcc", version, newTar(
 		"https://ftp.tsukuba.wide.ad.jp/software/gcc/releases/"+
 			"gcc-"+version+"/gcc-"+version+".tar.gz",
 		checksum,
@@ -1346,7 +1346,7 @@ ln -s system/lib /work/
 	), version
 }
 func init() {
-	artifactsM[gcc] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGCC,

 		Name:        "gcc",
@@ -1362,5 +1362,5 @@ func init() {
 		},

 		ID: 6502,
-	}
+	})
 }
--- a/internal/rosa/go.go
+++ b/internal/rosa/go.go
@@ -7,9 +7,9 @@ import (
 )

 // newGoBootstrap returns the Go bootstrap toolchain.
-func (t Toolchain) newGoBootstrap() pkg.Artifact {
+func (s *S) newGoBootstrap(t Toolchain) pkg.Artifact {
 	const checksum = "8o9JL_ToiQKadCTb04nvBDkp8O1xiWOolAxVEqaTGodieNe4lOFEjlOxN3bwwe23"
-	return t.New("go1.4-bootstrap", 0, t.AppendPresets(nil,
+	return s.New(t, "go1.4-bootstrap", 0, s.AppendPresets(t, nil,
 		Bash,
 	), nil, []string{
 		"CGO_ENABLED=0",
@@ -28,17 +28,18 @@ chmod -R +w ..
 }

 // newGo returns a specific version of the Go toolchain.
-func (t Toolchain) newGo(
+func (s *S) newGo(
+	t Toolchain,
 	version, checksum string,
 	env []string,
 	script string,
 	extra ...pkg.Artifact,
 ) pkg.Artifact {
 	name := "all"
-	if presetOpts&OptSkipCheck != 0 {
+	if s.opts&OptSkipCheck != 0 {
 		name = "make"
 	}
-	return t.New("go"+version, 0, t.AppendPresets(extra,
+	return s.New(t, "go"+version, 0, s.AppendPresets(t, extra,
 		Bash,
 	), nil, slices.Concat([]string{
 		"CC=cc",
@@ -65,27 +66,27 @@ ln -s \
 	)))
 }

-func (t Toolchain) newGoLatest() (pkg.Artifact, string) {
+func (t Toolchain) newGoLatest(s *S) (pkg.Artifact, string) {
 	var (
 		bootstrapEnv   []string
 		bootstrapExtra []pkg.Artifact

 		finalEnv []string
 	)
-	switch arch {
+	switch s.arch {
 	case "amd64":
-		bootstrapExtra = append(bootstrapExtra, t.newGoBootstrap())
+		bootstrapExtra = append(bootstrapExtra, s.newGoBootstrap(t))

 	case "arm64", "riscv64":
 		bootstrapEnv = append(bootstrapEnv, "GOROOT_BOOTSTRAP=/system")
-		bootstrapExtra = t.AppendPresets(bootstrapExtra, gcc)
+		bootstrapExtra = s.AppendPresets(t, bootstrapExtra, gcc)
 		finalEnv = append(finalEnv, "CGO_ENABLED=0")

 	default:
-		panic("unsupported target " + arch)
+		panic("unsupported target " + s.arch)
 	}

-	go119 := t.newGo(
+	go119 := s.newGo(t,
 		"1.19",
 		"9_e0aFHsIkVxWVGsp9T2RvvjOc3p4n9o9S8tkNe9Cvgzk_zI2FhRQB7ioQkeAAro",
 		append(bootstrapEnv, "CGO_ENABLED=0"), `
@@ -101,13 +102,13 @@ echo \
 	os/rawconn_test.go
 `, bootstrapExtra...)

-	go121 := t.newGo(
+	go121 := s.newGo(t,
 		"1.21.13",
 		"YtrDka402BOAEwywx03Vz4QlVwoBiguJHzG7PuythMCPHXS8CVMLvzmvgEbu4Tzu",
 		[]string{"CGO_ENABLED=0"}, `
 sed -i \
-	's,/lib/ld-musl-`+linuxArch()+`.so.1,/system/bin/linker,' \
-	cmd/link/internal/`+arch+`/obj.go
+	's,/lib/ld-musl-`+s.linuxArch()+`.so.1,/system/bin/linker,' \
+	cmd/link/internal/`+s.arch+`/obj.go

 rm \
 	crypto/tls/handshake_client_test.go \
@@ -119,23 +120,23 @@ echo \
 `, go119,
 	)

-	go123 := t.newGo(
+	go123 := s.newGo(t,
 		"1.23.12",
 		"wcI32bl1tkqbgcelGtGWPI4RtlEddd-PTd76Eb-k7nXA5LbE9yTNdIL9QSOOxMOs",
 		[]string{"CGO_ENABLED=0"}, `
 sed -i \
-	's,/lib/ld-musl-`+linuxArch()+`.so.1,/system/bin/linker,' \
-	cmd/link/internal/`+arch+`/obj.go
+	's,/lib/ld-musl-`+s.linuxArch()+`.so.1,/system/bin/linker,' \
+	cmd/link/internal/`+s.arch+`/obj.go
 `, go121,
 	)

-	go125 := t.newGo(
+	go125 := s.newGo(t,
 		"1.25.10",
 		"TwKwatkpwal-j9U2sDSRPEdM3YesI4Gm88YgGV59wtU-L85K9gA7UPy9SCxn6PMb",
 		[]string{"CGO_ENABLED=0"}, `
 sed -i \
-	's,/lib/ld-musl-`+linuxArch()+`.so.1,/system/bin/linker,' \
-	cmd/link/internal/`+arch+`/obj.go
+	's,/lib/ld-musl-`+s.linuxArch()+`.so.1,/system/bin/linker,' \
+	cmd/link/internal/`+s.arch+`/obj.go

 rm \
 	os/root_unix_test.go \
@@ -147,13 +148,13 @@ rm \
 		version  = "1.26.3"
 		checksum = "lEiFocZFnN5fKvZzmwVdqc9pYUjAuhzqZGbuiOqxUP4XdcY8yECisKcqsQ_eNn1N"
 	)
-	return t.newGo(
+	return s.newGo(t,
 		version,
 		checksum,
 		finalEnv, `
 sed -i \
-	's,/lib/ld-musl-`+linuxArch()+`.so.1,/system/bin/linker,' \
-	cmd/link/internal/`+arch+`/obj.go
+	's,/lib/ld-musl-`+s.linuxArch()+`.so.1,/system/bin/linker,' \
+	cmd/link/internal/`+s.arch+`/obj.go
 sed -i \
 	's/cpu.X86.HasAVX512VBMI/& \&\& cpu.X86.HasPOPCNT/' \
 	internal/runtime/gc/scan/scan_amd64.go
@@ -166,7 +167,7 @@ rm \
 	), version
 }
 func init() {
-	artifactsM[Go] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGoLatest,

 		Name:        "go",
@@ -174,5 +175,5 @@ func init() {
 		Website:     "https://go.dev/",

 		ID: 1227,
-	}
+	})
 }
--- a/internal/rosa/gtk.go
+++ b/internal/rosa/gtk.go
@@ -5,12 +5,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newGLib() (pkg.Artifact, string) {
+func (t Toolchain) newGLib(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.88.1"
 		checksum = "Rkszn6W4RHjyspyqfXdVAVawdwDJCuS0Zu0f7qot7tbJhnw2fUDoUUJB40m-1MCX"
 	)
-	return t.NewPackage("glib", version, t.newTagRemote(
+	return s.NewPackage(t, "glib", version, s.newTagRemote(t,
 		"https://gitlab.gnome.org/GNOME/glib.git",
 		version, checksum,
 	), &PackageAttr{
@@ -42,7 +42,7 @@ func (t Toolchain) newGLib() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[GLib] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGLib,

 		Name:        "glib",
@@ -56,5 +56,5 @@ func init() {
 		},

 		ID: 10024,
-	}
+	})
 }
--- a/internal/rosa/hakurei.go
+++ b/internal/rosa/hakurei.go
@@ -2,7 +2,8 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newHakurei(
+func (s *S) newHakurei(
+	t Toolchain,
 	suffix, script string,
 	withHostname bool,
 ) pkg.Artifact {
@@ -14,7 +15,7 @@ go build -o /bin/hostname /usr/src/hostname/main.go
 		hostname = ""
 	}

-	return t.New("hakurei"+suffix+"-"+hakureiVersion, 0, t.AppendPresets(nil,
+	return s.New(t, "hakurei"+suffix+"-"+hakureiVersion, 0, s.AppendPresets(t, nil,
 		Go,
 		PkgConfig,

@@ -38,8 +39,8 @@ go build -o /bin/hostname /usr/src/hostname/main.go
 cd /usr/src/hakurei

 HAKUREI_VERSION='v`+hakureiVersion+`'
-`+script, pkg.Path(AbsUsrSrc.Append("hakurei"), true, t.NewPatchedSource(
-		"hakurei", hakureiVersion, hakureiSource, false, hakureiPatches...,
+`+script, pkg.Path(AbsUsrSrc.Append("hakurei"), true, s.NewPatchedSource(
+		t, "hakurei", hakureiVersion, hakureiSource, false, hakureiPatches...,
 	)), pkg.Path(AbsUsrSrc.Append("hostname", "main.go"), false, pkg.NewFile(
 		"hostname.go",
 		[]byte(`
@@ -58,9 +59,9 @@ func main() {
 	)))
 }
 func init() {
-	artifactsM[Hakurei] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newHakurei("", `
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.newHakurei(t, "", `
 mkdir -p /work/system/libexec/hakurei/

 echo "Building hakurei for $(go env GOOS)/$(go env GOARCH)."
@@ -93,14 +94,14 @@ mkdir -p /work/system/bin/
 		Website:     "https://hakurei.app/",

 		ID: 388834,
-	}
-	artifactsM[HakureiDist] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
+	})
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
 			name := "all"
-			if presetOpts&OptSkipCheck != 0 {
+			if s.opts&OptSkipCheck != 0 {
 				name = "make"
 			}
-			return t.newHakurei("-dist", `
+			return s.newHakurei(t, "-dist", `
 export HAKUREI_VERSION
 DESTDIR=/work /usr/src/hakurei/`+name+`.sh
 `, true), hakureiVersion
@@ -109,5 +110,5 @@ DESTDIR=/work /usr/src/hakurei/`+name+`.sh
 		Name:        "hakurei-dist",
 		Description: "low-level userspace tooling for Rosa OS (distribution tarball)",
 		Website:     "https://hakurei.app/",
-	}
+	})
 }
--- a/internal/rosa/hwdata.go
+++ b/internal/rosa/hwdata.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newHwdata() (pkg.Artifact, string) {
+func (t Toolchain) newHwdata(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.407"
 		checksum = "6p1XD0CRuzt6hLfjv4ShKBW934BexmoPkRrmwxD4J63fBVCzVBRHyF8pVJdW_Xjm"
 	)
-	return t.NewPackage("hwdata", version, newFromGitHub(
+	return s.NewPackage(t, "hwdata", version, newFromGitHub(
 		"vcrhonek/hwdata",
 		"v"+version, checksum,
 	), &PackageAttr{
@@ -22,7 +22,7 @@ func (t Toolchain) newHwdata() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Hwdata] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newHwdata,

 		Name:        "hwdata",
@@ -30,5 +30,5 @@ func init() {
 		Website:     "https://github.com/vcrhonek/hwdata",

 		ID: 5387,
-	}
+	})
 }
--- a/internal/rosa/images.go
+++ b/internal/rosa/images.go
@@ -6,12 +6,12 @@ import (
 )

 func init() {
-	artifactsM[EarlyInit] = Metadata{
+	native.MustRegister(&Artifact{
 		Name:        "earlyinit",
 		Description: "Rosa OS initramfs init program",

-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newHakurei("-early-init", `
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.newHakurei(t, "-early-init", `
 mkdir -p /work/system/libexec/hakurei/

 echo '# Building earlyinit.'
@@ -24,15 +24,14 @@ go build -trimpath -v -o /work/system/libexec/hakurei -ldflags="-s -w
 echo
 `, false), Unversioned
 		},
-	}
+	})
 }
-
-func (t Toolchain) newImageSystem() (pkg.Artifact, string) {
-	return t.New("system.img", TNoToolchain, t.AppendPresets(nil,
+func (t Toolchain) newImageSystem(s *S) (pkg.Artifact, string) {
+	return s.New(t, "system.img", TNoToolchain, s.AppendPresets(t, nil,
 		SquashfsTools,
 	), nil, nil, `
 mksquashfs /mnt/system /work/system.img
-`, pkg.Path(fhs.AbsRoot.Append("mnt"), false, t.AppendPresets(nil,
+`, pkg.Path(fhs.AbsRoot.Append("mnt"), false, s.AppendPresets(t, nil,
 		Musl,
 		Mksh,
 		Toybox,
@@ -43,16 +42,15 @@ mksquashfs /mnt/system /work/system.img
 	)...)), Unversioned
 }
 func init() {
-	artifactsM[ImageSystem] = Metadata{
+	native.MustRegister(&Artifact{
 		Name:        "system-image",
 		Description: "Rosa OS system image",

 		f: Toolchain.newImageSystem,
-	}
+	})
 }
-
-func (t Toolchain) newImageInitramfs() (pkg.Artifact, string) {
-	return t.New("initramfs", TNoToolchain, t.AppendPresets(nil,
+func (t Toolchain) newImageInitramfs(s *S) (pkg.Artifact, string) {
+	return s.New(t, "initramfs", TNoToolchain, s.AppendPresets(t, nil,
 		Zstd,
 		EarlyInit,
 		GenInitCPIO,
@@ -66,10 +64,10 @@ file /init /system/libexec/hakurei/earlyinit 0555 0 0
 `)))), Unversioned
 }
 func init() {
-	artifactsM[ImageInitramfs] = Metadata{
+	native.MustRegister(&Artifact{
 		Name:        "initramfs-image",
 		Description: "Rosa OS initramfs image",

 		f: Toolchain.newImageInitramfs,
-	}
+	})
 }
--- a/internal/rosa/kernel.go
+++ b/internal/rosa/kernel.go
@@ -11,26 +11,26 @@ var kernelSource = newTar(
 	pkg.TarGzip,
 )

-func (t Toolchain) newKernelSource() (pkg.Artifact, string) {
-	return t.New("kernel-"+kernelVersion+"-src", 0, nil, nil, nil, `
+func (t Toolchain) newKernelSource(s *S) (pkg.Artifact, string) {
+	return s.New(t, "kernel-"+kernelVersion+"-src", 0, nil, nil, nil, `
 mkdir -p /work/usr/src/
 cp -r /usr/src/linux /work/usr/src/
 chmod -R +w /work/usr/src/linux/
 `, pkg.Path(AbsUsrSrc.Append("linux"), false, kernelSource)), kernelVersion
 }
 func init() {
-	artifactsM[KernelSource] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newKernelSource,

 		Name:        "kernel-source",
 		Description: "a writable kernel source tree installed to /usr/src/linux",
 		Website:     "https://kernel.org/",
-	}
+	})
 }

-func (t Toolchain) newKernelHeaders() (pkg.Artifact, string) {
+func (t Toolchain) newKernelHeaders(s *S) (pkg.Artifact, string) {
 	const checksum = "lCmBNcMeUmXifg0vecKOPy3GAaFcJSmOPnf3wit9xYTDSTsFADPt1xxUFfmTn1fD"
-	return t.NewPackage("kernel-headers", kernelVersion, kernelSource, &PackageAttr{
+	return s.NewPackage(t, "kernel-headers", kernelVersion, kernelSource, &PackageAttr{
 		Flag:          TEarly,
 		KnownChecksum: new(mustDecode(checksum)),

@@ -67,17 +67,17 @@ cat \
 	), kernelVersion
 }
 func init() {
-	artifactsM[KernelHeaders] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newKernelHeaders,

 		Name:        "kernel-headers",
 		Description: "an installation of kernel headers",
 		Website:     "https://kernel.org/",
-	}
+	})
 }

-func (t Toolchain) newKernel() (pkg.Artifact, string) {
-	return t.NewPackage("kernel", kernelVersion, kernelSource, &PackageAttr{
+func (t Toolchain) newKernel(s *S) (pkg.Artifact, string) {
+	return s.NewPackage(t, "kernel", kernelVersion, kernelSource, &PackageAttr{
 		Env: []string{
 			"PATH=/system/sbin",
 		},
@@ -1272,7 +1272,7 @@ rm -v /work/system/lib/modules/` + kernelVersion + `/build
 	), kernelVersion
 }
 func init() {
-	artifactsM[Kernel] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newKernel,

 		Name:        "kernel",
@@ -1280,30 +1280,30 @@ func init() {
 		Website:     "https://kernel.org/",

 		ID: 375621,
-	}
+	})
 }

-func (t Toolchain) newGenInitCPIO() (pkg.Artifact, string) {
-	return t.New("gen_init_cpio-"+kernelVersion, 0, nil, nil, nil, `
+func (t Toolchain) newGenInitCPIO(s *S) (pkg.Artifact, string) {
+	return s.New(t, "gen_init_cpio-"+kernelVersion, 0, nil, nil, nil, `
 mkdir -p /work/system/bin/
 cc -o /work/system/bin/gen_init_cpio /usr/src/linux/usr/gen_init_cpio.c
 `, pkg.Path(AbsUsrSrc.Append("linux"), false, kernelSource)), kernelVersion
 }
 func init() {
-	artifactsM[GenInitCPIO] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newGenInitCPIO,

 		Name:        "gen_init_cpio",
 		Description: "a program in the kernel source tree for creating initramfs archive",
-	}
+	})
 }

-func (t Toolchain) newFirmware() (pkg.Artifact, string) {
+func (t Toolchain) newFirmware(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "20260410"
 		checksum = "J8PdQlGqwrivpskPzbL6xacqR6mlKtXpe5RpzFfVzKPAgG81ZRXsc3qrxwdGJbil"
 	)
-	return t.NewPackage("firmware", version, newFromGitLab(
+	return s.NewPackage(t, "firmware", version, newFromGitLab(
 		"gitlab.com",
 		"kernel-firmware/linux-firmware",
 		version,
@@ -1337,7 +1337,7 @@ func (t Toolchain) newFirmware() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Firmware] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newFirmware,

 		Name:        "firmware",
@@ -1345,5 +1345,5 @@ func init() {
 		Website:     "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/",

 		ID: 141464,
-	}
+	})
 }
--- a/internal/rosa/kmod.go
+++ b/internal/rosa/kmod.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newKmod() (pkg.Artifact, string) {
+func (t Toolchain) newKmod(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "34.2"
 		checksum = "0K7POeTKxMhExsaTsnKAC6LUNsRSfe6sSZxWONPbOu-GI_pXOw3toU_BIoqfBhJV"
 	)
-	return t.NewPackage("kmod", version, newTar(
+	return s.NewPackage(t, "kmod", version, newTar(
 		"https://www.kernel.org/pub/linux/utils/kernel/"+
 			"kmod/kmod-"+version+".tar.gz",
 		checksum,
@@ -32,7 +32,7 @@ func (t Toolchain) newKmod() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Kmod] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newKmod,

 		Name:        "kmod",
@@ -46,5 +46,5 @@ func init() {
 		},

 		ID: 1517,
-	}
+	})
 }
--- a/internal/rosa/libarchive.go
+++ b/internal/rosa/libarchive.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibarchive() (pkg.Artifact, string) {
+func (t Toolchain) newLibarchive(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.8.7"
 		checksum = "CUJK4MDQmZmATClgQBH2Wt-7Ts4iiSUlg1J_TVb6-5IK3rVUgVLIMc5k-bnWB9w3"
 	)
-	return t.NewPackage("libarchive", version, newFromGitHub(
+	return s.NewPackage(t, "libarchive", version, newFromGitHub(
 		"libarchive/libarchive",
 		"v"+version, checksum,
 	), &PackageAttr{
@@ -88,7 +88,7 @@ install -Dv /usr/src/CTestCustom.cmake /cure/
 	}, (*CMakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Libarchive] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibarchive,

 		Name:        "libarchive",
@@ -96,5 +96,5 @@ func init() {
 		Website:     "https://www.libarchive.org/",

 		ID: 1558,
-	}
+	})
 }
--- a/internal/rosa/libbsd.go
+++ b/internal/rosa/libbsd.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibmd() (pkg.Artifact, string) {
+func (t Toolchain) newLibmd(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.2.0"
 		checksum = "1rJ6joAO0wwMZvSfnRNkc1MOhywyAq7SM8VmF92NvDtv7Qdl1LRbjm5fg_DFFtGj"
 	)
-	return t.NewPackage("libmd", version, t.newTagRemote(
+	return s.NewPackage(t, "libmd", version, s.newTagRemote(t,
 		"https://git.hadrons.org/git/libmd.git",
 		version, checksum,
 	), nil, &MakeHelper{
@@ -21,7 +21,7 @@ install -D /usr/src/libmd/src/helper.c src/helper.c
 	), version
 }
 func init() {
-	artifactsM[Libmd] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibmd,

 		Name:        "libmd",
@@ -29,15 +29,15 @@ func init() {
 		Website:     "https://www.hadrons.org/software/libmd/",

 		ID: 15525,
-	}
+	})
 }

-func (t Toolchain) newLibbsd() (pkg.Artifact, string) {
+func (t Toolchain) newLibbsd(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.12.2"
 		checksum = "NVS0xFLTwSP8JiElEftsZ-e1_C-IgJhHrHE77RwKt5178M7r087waO-zYx2_dfGX"
 	)
-	return t.NewPackage("libbsd", version, t.newTagRemote(
+	return s.NewPackage(t, "libbsd", version, s.newTagRemote(t,
 		"https://gitlab.freedesktop.org/libbsd/libbsd.git",
 		version, checksum,
 	), nil, &MakeHelper{
@@ -50,7 +50,7 @@ func (t Toolchain) newLibbsd() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libbsd] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibbsd,

 		Name:        "libbsd",
@@ -58,5 +58,5 @@ func init() {
 		Website:     "https://libbsd.freedesktop.org/",

 		ID: 1567,
-	}
+	})
 }
--- a/internal/rosa/libcap.go
+++ b/internal/rosa/libcap.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibcap() (pkg.Artifact, string) {
+func (t Toolchain) newLibcap(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.78"
 		checksum = "wFdUkBhFMD9InPnrBZyegWrlPSAg_9JiTBC-eSFyWWlmbzL2qjh2mKxr9Kx2a8ut"
 	)
-	return t.NewPackage("libcap", version, newTar(
+	return s.NewPackage(t, "libcap", version, newTar(
 		"https://git.kernel.org/pub/scm/libs/libcap/libcap.git/"+
 			"snapshot/libcap-"+version+".tar.gz",
 		checksum,
@@ -42,7 +42,7 @@ ln -s ../system/bin/bash /bin/
 	), version
 }
 func init() {
-	artifactsM[Libcap] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibcap,

 		Name:        "libcap",
@@ -50,5 +50,5 @@ func init() {
 		Website:     "https://sites.google.com/site/fullycapable/",

 		ID: 1569,
-	}
+	})
 }
--- a/internal/rosa/libconfig.go
+++ b/internal/rosa/libconfig.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibconfig() (pkg.Artifact, string) {
+func (t Toolchain) newLibconfig(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.8.2"
 		checksum = "fD32hjeAZuTz98g6WYHRwsxphrgrEFqxi5Z1jlJemPckPBfxpS3i5HgshAuA6vmT"
 	)
-	return t.NewPackage("libconfig", version, newFromGitHub(
+	return s.NewPackage(t, "libconfig", version, newFromGitHub(
 		"hyperrealm/libconfig",
 		"v"+version,
 		checksum,
@@ -38,7 +38,7 @@ index eba7eae..f916d2e 100644
 	}, (*CMakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Libconfig] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibconfig,

 		Name:        "libconfig",
@@ -46,5 +46,5 @@ func init() {
 		Website:     "https://hyperrealm.github.io/libconfig/",

 		ID: 1580,
-	}
+	})
 }
--- a/internal/rosa/libdisplay-info.go
+++ b/internal/rosa/libdisplay-info.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibdisplayInfo() (pkg.Artifact, string) {
+func (t Toolchain) newLibdisplayInfo(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.3.0"
 		checksum = "yjOqPUHHYgRtpqGw5RI1n2Q1_hO5j0LiFNMbjcRWV4Nf71XwwoC9fZMlKBDeLchT"
 	)
-	return t.NewPackage("libdisplay-info", version, newFromGitLab(
+	return s.NewPackage(t, "libdisplay-info", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"emersion/libdisplay-info",
 		version, checksum,
@@ -18,7 +18,7 @@ func (t Toolchain) newLibdisplayInfo() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibdisplayInfo] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibdisplayInfo,

 		Name:        "libdisplay-info",
@@ -26,5 +26,5 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/emersion/libdisplay-info",

 		ID: 326668,
-	}
+	})
 }
--- a/internal/rosa/libepoxy.go
+++ b/internal/rosa/libepoxy.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibepoxy() (pkg.Artifact, string) {
+func (t Toolchain) newLibepoxy(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.5.10"
 		checksum = "OHI8wshrlGw6BMGrmSyejJtwzM2gPhyFJrTsKxULyKMmYrfgcOe7Iw2ibVoUND_Q"
 	)
-	return t.NewPackage("libepoxy", version, newFromGitHub(
+	return s.NewPackage(t, "libepoxy", version, newFromGitHub(
 		"anholt/libepoxy",
 		version,
 		checksum,
@@ -21,7 +21,7 @@ func (t Toolchain) newLibepoxy() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libepoxy] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibepoxy,

 		Name:        "libepoxy",
@@ -29,5 +29,5 @@ func init() {
 		Website:     "https://github.com/anholt/libepoxy",

 		ID: 6090,
-	}
+	})
 }
--- a/internal/rosa/libev.go
+++ b/internal/rosa/libev.go
@@ -2,19 +2,19 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibev() (pkg.Artifact, string) {
+func (t Toolchain) newLibev(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.33"
 		checksum = "774eSXV_4k8PySRprUDChbEwsw-kzjIFnJ3MpNOl5zDpamBRvC3BqPyRxvkwcL6_"
 	)
-	return t.NewPackage("libev", version, newTar(
+	return s.NewPackage(t, "libev", version, newTar(
 		"https://dist.schmorp.de/libev/Attic/libev-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
 	), nil, (*MakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[Libev] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibev,

 		Name:        "libev",
@@ -22,5 +22,5 @@ func init() {
 		Website:     "http://libev.schmorp.de/",

 		ID: 1605,
-	}
+	})
 }
--- a/internal/rosa/libexpat.go
+++ b/internal/rosa/libexpat.go
@@ -6,12 +6,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newLibexpat() (pkg.Artifact, string) {
+func (t Toolchain) newLibexpat(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.8.1"
 		checksum = "iMEtbOJhQfGof2GxSlxffQSI1va_NDDQ9VIuqcPbNZ0291Dr8wttD5QecYyjIQap"
 	)
-	return t.NewPackage("libexpat", version, newFromGitHubRelease(
+	return s.NewPackage(t, "libexpat", version, newFromGitHubRelease(
 		"libexpat/libexpat",
 		"R_"+strings.ReplaceAll(version, ".", "_"),
 		"expat-"+version+".tar.bz2",
@@ -22,7 +22,7 @@ func (t Toolchain) newLibexpat() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libexpat] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibexpat,

 		Name:        "libexpat",
@@ -30,5 +30,5 @@ func init() {
 		Website:     "https://libexpat.github.io/",

 		ID: 770,
-	}
+	})
 }
--- a/internal/rosa/libffi.go
+++ b/internal/rosa/libffi.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibffi() (pkg.Artifact, string) {
+func (t Toolchain) newLibffi(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.5.2"
 		checksum = "2_Q-ZNBBbVhltfL5zEr0wljxPegUimTK4VeMSiwJEGksls3n4gj3lV0Ly3vviSFH"
 	)
-	return t.NewPackage("libffi", version, newFromGitHubRelease(
+	return s.NewPackage(t, "libffi", version, newFromGitHubRelease(
 		"libffi/libffi",
 		"v"+version,
 		"libffi-"+version+".tar.gz",
@@ -18,7 +18,7 @@ func (t Toolchain) newLibffi() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libffi] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibffi,

 		Name:        "libffi",
@@ -26,5 +26,5 @@ func init() {
 		Website:     "https://sourceware.org/libffi/",

 		ID: 1611,
-	}
+	})
 }
--- a/internal/rosa/libgd.go
+++ b/internal/rosa/libgd.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibgd() (pkg.Artifact, string) {
+func (t Toolchain) newLibgd(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.3.3"
 		checksum = "8T-sh1_FJT9K9aajgxzh8ot6vWIF-xxjcKAHvTak9MgGUcsFfzP8cAvvv44u2r36"
 	)
-	return t.NewPackage("libgd", version, newFromGitHubRelease(
+	return s.NewPackage(t, "libgd", version, newFromGitHubRelease(
 		"libgd/libgd",
 		"gd-"+version,
 		"libgd-"+version+".tar.gz", checksum,
@@ -24,7 +24,7 @@ mkdir /dev/shm/gd
 	), version
 }
 func init() {
-	artifactsM[Libgd] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibgd,

 		Name:        "libgd",
@@ -36,5 +36,5 @@ func init() {
 		},

 		ID: 880,
-	}
+	})
 }
--- a/internal/rosa/libpng.go
+++ b/internal/rosa/libpng.go
@@ -6,12 +6,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newLibpng() (pkg.Artifact, string) {
+func (t Toolchain) newLibpng(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.6.58"
 		checksum = "m_a5lROJH7vmF3cMjqwTUqURuQLhV1JQx2ySPzcN3VPdgDB9pG3UINsIx_mtkr-t"
 	)
-	return t.NewPackage("libpng", version, newTar(
+	return s.NewPackage(t, "libpng", version, newTar(
 		"https://downloads.sourceforge.net/project/libpng/libpng"+
 			strings.Join(strings.SplitN(version, ".", 3)[:2], "")+
 			"/"+version+"/libpng-"+version+".tar.gz",
@@ -22,7 +22,7 @@ func (t Toolchain) newLibpng() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libpng] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibpng,

 		Name:        "libpng",
@@ -34,5 +34,5 @@ func init() {
 		},

 		ID: 1705,
-	}
+	})
 }
--- a/internal/rosa/libpsl.go
+++ b/internal/rosa/libpsl.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibpsl() (pkg.Artifact, string) {
+func (t Toolchain) newLibpsl(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.21.5"
 		checksum = "XjfxSzh7peG2Vg4vJlL8z4JZJLcXqbuP6pLWkrGCmRxlnYUFTKNBqWGHCxEOlCad"
 	)
-	return t.NewPackage("libpsl", version, newFromGitHubRelease(
+	return s.NewPackage(t, "libpsl", version, newFromGitHubRelease(
 		"rockdaboot/libpsl",
 		version,
 		"libpsl-"+version+".tar.gz",
@@ -25,7 +25,7 @@ test_disable 'int main(){return 0;}' tests/test-is-public-builtin.c
 	), version
 }
 func init() {
-	artifactsM[Libpsl] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibpsl,

 		Name:        "libpsl",
@@ -33,5 +33,5 @@ func init() {
 		Website:     "https://rockdaboot.github.io/libpsl/",

 		ID: 7305,
-	}
+	})
 }
--- a/internal/rosa/libseccomp.go
+++ b/internal/rosa/libseccomp.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibseccomp() (pkg.Artifact, string) {
+func (t Toolchain) newLibseccomp(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.6.0"
 		checksum = "mMu-iR71guPjFbb31u-YexBaanKE_nYPjPux-vuBiPfS_0kbwJdfCGlkofaUm-EY"
 	)
-	return t.NewPackage("libseccomp", version, newFromGitHubRelease(
+	return s.NewPackage(t, "libseccomp", version, newFromGitHubRelease(
 		"seccomp/libseccomp",
 		"v"+version,
 		"libseccomp-"+version+".tar.gz",
@@ -43,7 +43,7 @@ index adccef3..65a277a 100644
 	), version
 }
 func init() {
-	artifactsM[Libseccomp] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibseccomp,

 		Name:        "libseccomp",
@@ -51,5 +51,5 @@ func init() {
 		Website:     "https://github.com/seccomp/libseccomp/",

 		ID: 13823,
-	}
+	})
 }
--- a/internal/rosa/libtirpc.go
+++ b/internal/rosa/libtirpc.go
@@ -6,12 +6,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newLibtirpc() (pkg.Artifact, string) {
+func (t Toolchain) newLibtirpc(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.3.7"
 		checksum = "nzFfu7LNvnSNiNAryD1vtnNWnU-Xqee8KqfXUKoBf5yjb5-dkeRkYuRijdCoYLof"
 	)
-	return t.NewPackage("libtirpc", version, t.newTagRemote(
+	return s.NewPackage(t, "libtirpc", version, s.newTagRemote(t,
 		"git://linux-nfs.org/~steved/libtirpc",
 		"libtirpc-"+
 			strings.Join(strings.SplitN(version, ".", 3), "-"),
@@ -32,7 +32,7 @@ func (t Toolchain) newLibtirpc() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libtirpc] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibtirpc,

 		Name:        "libtirpc",
@@ -40,5 +40,5 @@ func init() {
 		Website:     "https://sourceforge.net/projects/libtirpc/",

 		ID: 1740,
-	}
+	})
 }
--- a/internal/rosa/libucontext.go
+++ b/internal/rosa/libucontext.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibucontext() (pkg.Artifact, string) {
+func (t Toolchain) newLibucontext(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.5.1"
 		checksum = "mUgeyJknjMxT-5fORzz-rqhZfP3Y7EZGBhOwvhuX7MsF4Pk9wkuwtrLf5IML-jWu"
 	)
-	return t.NewPackage("libucontext", version, newFromGitHub(
+	return s.NewPackage(t, "libucontext", version, newFromGitHub(
 		"kaniini/libucontext",
 		"libucontext-"+version,
 		checksum,
@@ -21,13 +21,13 @@ func (t Toolchain) newLibucontext() (pkg.Artifact, string) {
 		SkipConfigure: true,
 		InPlace:       true,
 		Make: []string{
-			"ARCH=" + linuxArch(),
+			"ARCH=" + s.linuxArch(),
 		},
 		Install: "make prefix=/system DESTDIR=/work install",
 	}), version
 }
 func init() {
-	artifactsM[Libucontext] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibucontext,

 		Name:        "libucontext",
@@ -35,5 +35,5 @@ func init() {
 		Website:     "https://github.com/kaniini/libucontext/",

 		ID: 17085,
-	}
+	})
 }
--- a/internal/rosa/libxml2.go
+++ b/internal/rosa/libxml2.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibxml2() (pkg.Artifact, string) {
+func (t Toolchain) newLibxml2(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.15.3"
 		checksum = "oJy74htGlEpf70KPvpW18fYJo0RQQkCXZRwqUz6NoXborS3HCq3Nm4gsyaSeNmUH"
 	)
-	return t.NewPackage("libxml2", version, newFromGitLab(
+	return s.NewPackage(t, "libxml2", version, newFromGitLab(
 		"gitlab.gnome.org",
 		"GNOME/libxml2",
 		"v"+version, checksum,
@@ -20,7 +20,7 @@ func (t Toolchain) newLibxml2() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libxml2] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxml2,

 		Name:        "libxml2",
@@ -28,5 +28,5 @@ func init() {
 		Website:     "https://gitlab.gnome.org/GNOME/libxml2/",

 		ID: 1783,
-	}
+	})
 }
--- a/internal/rosa/libxslt.go
+++ b/internal/rosa/libxslt.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibxslt() (pkg.Artifact, string) {
+func (t Toolchain) newLibxslt(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.1.45"
 		checksum = "67ks7v8od2oWaEGf23Sst_Xbn_8brQyolQjqxPoO-lK35k_WJhi2Px5JJgbk-nfn"
 	)
-	return t.NewPackage("libxslt", version, newFromGitLab(
+	return s.NewPackage(t, "libxslt", version, newFromGitLab(
 		"gitlab.gnome.org",
 		"GNOME/libxslt",
 		"v"+version, checksum,
@@ -26,7 +26,7 @@ func (t Toolchain) newLibxslt() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libxslt] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxslt,

 		Name:        "libxslt",
@@ -38,5 +38,5 @@ func init() {
 		},

 		ID: 13301,
-	}
+	})
 }
--- a/internal/rosa/llvm.go
+++ b/internal/rosa/llvm.go
@@ -29,10 +29,10 @@ func litArgs(verbose bool, skipChecks ...string) string {
 	return "'" + strings.Join(args, " ") + "'"
 }

-func (t Toolchain) newEarlyCompilerRT() (pkg.Artifact, string) {
-	version := t.Version(llvmSource)
+func (t Toolchain) newEarlyCompilerRT(s *S) (pkg.Artifact, string) {
+	source, version := s.Load(t, llvmSource)
 	major, _, _ := strings.Cut(version, ".")
-	return t.NewPackage("early-compiler-rt", version, t.Load(llvmSource), &PackageAttr{
+	return s.NewPackage(t, "early-compiler-rt", version, source, &PackageAttr{
 		Flag: TExclusive,
 	}, &CMakeHelper{
 		Append: []string{"compiler-rt"},
@@ -71,10 +71,10 @@ ln -s \
 	"/work/system/lib/clang/` + major + `/lib/"

 ln -s \
-	"clang_rt.crtbegin-` + linuxArch() + `.o" \
+	"clang_rt.crtbegin-` + s.linuxArch() + `.o" \
 	"/work/system/lib/${ROSA_TRIPLE}/crtbeginS.o"
 ln -s \
-	"clang_rt.crtend-` + linuxArch() + `.o" \
+	"clang_rt.crtend-` + s.linuxArch() + `.o" \
 	"/work/system/lib/${ROSA_TRIPLE}/crtendS.o"
 `,
 	},
@@ -85,7 +85,7 @@ ln -s \
 	), version
 }
 func init() {
-	artifactsM[earlyCompilerRT] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newEarlyCompilerRT,

 		Name:        "early-compiler-rt",
@@ -94,12 +94,12 @@ func init() {
 		Dependencies: P{
 			Musl,
 		},
-	}
+	})
 }

-func (t Toolchain) newEarlyRuntimes() (pkg.Artifact, string) {
-	version := t.Version(llvmSource)
-	return t.NewPackage("early-runtimes", version, t.Load(llvmSource), &PackageAttr{
+func (t Toolchain) newEarlyRuntimes(s *S) (pkg.Artifact, string) {
+	source, version := s.Load(t, llvmSource)
+	return s.NewPackage(t, "early-runtimes", version, source, &PackageAttr{
 		Flag: TExclusive,
 	}, &CMakeHelper{
 		Append: []string{"runtimes"},
@@ -145,7 +145,7 @@ func (t Toolchain) newEarlyRuntimes() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[earlyRuntimes] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newEarlyRuntimes,

 		Name:        "early-runtimes",
@@ -154,11 +154,11 @@ func init() {
 		Dependencies: P{
 			earlyCompilerRT,
 		},
-	}
+	})
 }

-func (t Toolchain) newLLVM() (pkg.Artifact, string) {
-	var early PArtifact = muslHeaders
+func (t Toolchain) newLLVM(s *S) (pkg.Artifact, string) {
+	early := muslHeaders
 	if t.isStage0() {
 		// The LLVM build system uses the system installation when building with
 		// LLVM_LINK_LLVM_DYLIB, since it builds runtimes after the fact, using
@@ -247,7 +247,7 @@ func (t Toolchain) newLLVM() (pkg.Artifact, string) {
 			// unwind: fails on musl
 			"eh_frame_fde_pc_range",
 		}
-		switch arch {
+		switch s.arch {
 		case "arm64":
 			skipChecks = append(skipChecks,
 				// LLVM: intermittently crashes
@@ -257,7 +257,7 @@ func (t Toolchain) newLLVM() (pkg.Artifact, string) {
 			)
 		}

-		if presetOpts&OptLLVMNoLTO == 0 {
+		if s.opts&OptLLVMNoLTO == 0 {
 			cache = append(cache, []KV{
 				// very expensive
 				{"LLVM_ENABLE_LTO", "Thin"},
@@ -273,8 +273,8 @@ func (t Toolchain) newLLVM() (pkg.Artifact, string) {
 		}...)
 	}

-	version := t.Version(llvmSource)
-	return t.NewPackage("llvm", version, t.Load(llvmSource), &PackageAttr{
+	source, version := s.Load(t, llvmSource)
+	return s.NewPackage(t, "llvm", version, source, &PackageAttr{
 		Flag: TExclusive,
 	}, &CMakeHelper{
 		Append: []string{"llvm"},
@@ -324,9 +324,9 @@ func init() {
 		checksum = "32gOaLPHcUlo3hkdk5RbFumTE01XKeCAYZcpvn8IDHF95egXVfDFSl6eZL3ChMen"
 	)

-	artifactsM[llvmSource] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.NewPatchedSource("llvm", version, newFromGitHub(
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.NewPatchedSource(t, "llvm", version, newFromGitHub(
 				"llvm/llvm-project",
 				"llvmorg-"+version,
 				checksum,
@@ -337,9 +337,9 @@ func init() {
 		Description: "LLVM monorepo with Rosa OS patches",

 		ID: 1830,
-	}
+	})

-	artifactsM[LLVM] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLLVM,

 		Name:        "llvm",
@@ -351,5 +351,5 @@ func init() {
 			Zstd,
 			Musl,
 		},
-	}
+	})
 }
--- a/internal/rosa/lm-sensors.go
+++ b/internal/rosa/lm-sensors.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLMSensors() (pkg.Artifact, string) {
+func (t Toolchain) newLMSensors(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3-6-2"
 		checksum = "7JYNutrihe-FP6r3ftf96uFZJJWPfxnBHL0ALSMA-vovaXVRr-sAjlLitw7WWpCI"
 	)
-	return t.NewPackage("lm_sensors", version, newFromGitHub(
+	return s.NewPackage(t, "lm_sensors", version, newFromGitHub(
 		"lm-sensors/lm-sensors",
 		"V"+version,
 		checksum,
@@ -47,7 +47,7 @@ ln -s \
 	), version
 }
 func init() {
-	artifactsM[LMSensors] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLMSensors,

 		Name:        "lm_sensors",
@@ -55,5 +55,5 @@ func init() {
 		Website:     "https://hwmon.wiki.kernel.org/lm_sensors",

 		ID: 1831,
-	}
+	})
 }
--- a/internal/rosa/make.go
+++ b/internal/rosa/make.go
@@ -7,12 +7,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newMake() (pkg.Artifact, string) {
+func (t Toolchain) newMake(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.4.1"
 		checksum = "YS_B07ZcAy9PbaK5_vKGj64SrxO2VMpnMKfc9I0Q9IC1rn0RwOH7802pJoj2Mq4a"
 	)
-	return t.New("make-"+version, TEarly, nil, nil, nil, `
+	return s.New(t, "make-"+version, TEarly, nil, nil, nil, `
 cd "$(mktemp -d)"
 /usr/src/make/configure \
 	--prefix=/system \
@@ -27,7 +27,7 @@ cd "$(mktemp -d)"
 	))), version
 }
 func init() {
-	artifactsM[Make] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMake,

 		Name:        "make",
@@ -35,7 +35,7 @@ func init() {
 		Website:     "https://www.gnu.org/software/make/",

 		ID: 1877,
-	}
+	})
 }

 // MakeHelper is the [Make] build system helper.
@@ -123,7 +123,7 @@ func (attr *MakeHelper) wantsDir() string {
 }

 // script generates the cure script.
-func (attr *MakeHelper) script(name string) string {
+func (attr *MakeHelper) script(s *S, name string) string {
 	if attr == nil {
 		attr = new(MakeHelper)
 	}
@@ -194,7 +194,7 @@ make \
 	}
 	scriptMake += "\n"

-	if !attr.SkipCheck && presetOpts&OptSkipCheck == 0 {
+	if !attr.SkipCheck && s.opts&OptSkipCheck == 0 {
 		scriptMake += attr.ScriptCheckEarly + `make \
 	` + jobsFlagE + ` \
 	`
--- a/internal/rosa/mesa.go
+++ b/internal/rosa/mesa.go
@@ -6,12 +6,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newLibglvnd() (pkg.Artifact, string) {
+func (t Toolchain) newLibglvnd(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.7.0"
 		checksum = "eIQJK2sgFQDHdeFkQO87TrSUaZRFG4y2DrwA8Ut-sGboI59uw1OOiIVqq2AIwnGY"
 	)
-	return t.NewPackage("libglvnd", version, newFromGitLab(
+	return s.NewPackage(t, "libglvnd", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"glvnd/libglvnd",
 		"v"+version,
@@ -35,7 +35,7 @@ trap 'kill $XVFB_PID && wait $XVFB_PID' EXIT
 	), version
 }
 func init() {
-	artifactsM[Libglvnd] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibglvnd,

 		Name:        "libglvnd",
@@ -47,15 +47,15 @@ func init() {
 		},

 		ID: 12098,
-	}
+	})
 }

-func (t Toolchain) newLibdrm() (pkg.Artifact, string) {
+func (t Toolchain) newLibdrm(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.4.133"
 		checksum = "bfj296NcR9DndO11hqDbSRFPqaweSLMqRk3dlCPZpM6FONX1WZ9J4JdbTDMUd1rU"
 	)
-	return t.NewPackage("libdrm", version, newFromGitLab(
+	return s.NewPackage(t, "libdrm", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"mesa/libdrm",
 		"libdrm-"+version,
@@ -72,7 +72,7 @@ func (t Toolchain) newLibdrm() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libdrm] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibdrm,

 		Name:        "libdrm",
@@ -84,15 +84,15 @@ func init() {
 		},

 		ID: 1596,
-	}
+	})
 }

-func (t Toolchain) newLibva() (pkg.Artifact, string) {
+func (t Toolchain) newLibva(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.23.0"
 		checksum = "UmF5tPyWIG_w5kiR3KFpoYbF7UUcaak5tyc-RhOheNTwQlLkPlifreFYCM9FQxbq"
 	)
-	return t.NewPackage("libva", version, newFromGitHub(
+	return s.NewPackage(t, "libva", version, newFromGitHub(
 		"intel/libva",
 		version,
 		checksum,
@@ -111,7 +111,7 @@ func (t Toolchain) newLibva() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libva] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibva,

 		Name:        "libva",
@@ -126,15 +126,15 @@ func init() {
 		},

 		ID: 1752,
-	}
+	})
 }

-func (t Toolchain) newMesa() (pkg.Artifact, string) {
+func (t Toolchain) newMesa(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "26.1.0"
 		checksum = "zU0fjqevySBaoi_5SLW3e2UffmGeBdxOuHmAHTH68n2hV-sjYoqg30koLqFXuk5y"
 	)
-	return t.NewPackage("mesa", version, newFromGitLab(
+	return s.NewPackage(t, "mesa", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"mesa/mesa",
 		"mesa-"+version,
@@ -238,7 +238,7 @@ func (t Toolchain) newMesa() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Mesa] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMesa,

 		Name:        "mesa",
@@ -261,5 +261,5 @@ func init() {
 		ID: 1970,

 		latest: (*Versions).getStable,
-	}
+	})
 }
--- a/internal/rosa/meson.go
+++ b/internal/rosa/meson.go
@@ -7,12 +7,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newMeson() (pkg.Artifact, string) {
+func (t Toolchain) newMeson(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.11.1"
 		checksum = "uvILRxdopwc6Dy17UbIeClcQr0qHqyTaqyk1M9OqWKN9PwB9N6UVAiyN8kSSz3r2"
 	)
-	return t.NewPackage("meson", version, newFromGitHub(
+	return s.NewPackage(t, "meson", version, newFromGitHub(
 		"mesonbuild/meson",
 		version,
 		checksum,
@@ -52,7 +52,7 @@ python3 ./run_project_tests.py \
 	), version
 }
 func init() {
-	artifactsM[Meson] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMeson,

 		Name:        "meson",
@@ -67,7 +67,7 @@ func init() {
 		},

 		ID: 6472,
-	}
+	})
 }

 // MesonHelper is the [Meson] build system helper.
@@ -106,7 +106,7 @@ func (*MesonHelper) createDir() bool { return false }
 func (*MesonHelper) wantsDir() string { return `"$(mktemp -d)"` }

 // script generates the cure script.
-func (attr *MesonHelper) script(name string) string {
+func (attr *MesonHelper) script(s *S, name string) string {
 	if attr == nil {
 		attr = new(MesonHelper)
 	}
@@ -117,7 +117,7 @@ func (attr *MesonHelper) script(name string) string {
 	}

 	var scriptTest string
-	if !attr.SkipTest && presetOpts&OptSkipCheck == 0 {
+	if !attr.SkipTest && s.opts&OptSkipCheck == 0 {
 		scriptTest = `
 meson test \
 	--print-errorlogs`
--- a/internal/rosa/mksh.go
+++ b/internal/rosa/mksh.go
@@ -2,16 +2,16 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newMksh() (pkg.Artifact, string) {
+func (t Toolchain) newMksh(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "59c"
 		checksum = "0Zj-k4nXEu3IuJY4lvwD2OrC2t27GdZj8SPy4DoaeuBRH1padWb7oREpYgwY8JNq"
 	)
 	scriptTest := "./test.sh -C regress:no-ctty\n"
-	if presetOpts&OptSkipCheck != 0 {
+	if s.opts&OptSkipCheck != 0 {
 		scriptTest = ""
 	}
-	return t.New("mksh-"+version, 0, t.AppendPresets(nil,
+	return s.New(t, "mksh-"+version, 0, s.AppendPresets(t, nil,
 		Perl,
 		Coreutils,
 	), nil, []string{
@@ -36,7 +36,7 @@ ln -vs ../system/bin/sh /work/bin/
 	))), version
 }
 func init() {
-	artifactsM[Mksh] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMksh,

 		Name:        "mksh",
@@ -44,5 +44,5 @@ func init() {
 		Website:     "https://www.mirbsd.org/mksh",

 		ID: 5590,
-	}
+	})
 }
--- a/internal/rosa/musl-fts.go
+++ b/internal/rosa/musl-fts.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newMuslFts() (pkg.Artifact, string) {
+func (t Toolchain) newMuslFts(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.2.7"
 		checksum = "N_p_ZApX3eHt7xoDCw1hLf6XdJOw7ZSx7xPvpvAP0knG2zgU0zeN5w8tt5Pg60XJ"
 	)
-	return t.NewPackage("musl-fts", version, newFromGitHub(
+	return s.NewPackage(t, "musl-fts", version, newFromGitHub(
 		"void-linux/musl-fts",
 		"v"+version,
 		checksum,
@@ -24,7 +24,7 @@ func (t Toolchain) newMuslFts() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[MuslFts] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMuslFts,

 		Name:        "musl-fts",
@@ -32,5 +32,5 @@ func init() {
 		Website:     "https://github.com/void-linux/musl-fts",

 		ID: 26980,
-	}
+	})
 }
--- a/internal/rosa/musl-obstack.go
+++ b/internal/rosa/musl-obstack.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newMuslObstack() (pkg.Artifact, string) {
+func (t Toolchain) newMuslObstack(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.2.3"
 		checksum = "tVRY_KjIlkkMszcaRlkKdBVQHIXTT_T_TiMxbwErlILXrOBosocg8KklppZhNdCG"
 	)
-	return t.NewPackage("musl-obstack", version, newFromGitHub(
+	return s.NewPackage(t, "musl-obstack", version, newFromGitHub(
 		"void-linux/musl-obstack",
 		"v"+version,
 		checksum,
@@ -24,7 +24,7 @@ func (t Toolchain) newMuslObstack() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[MuslObstack] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newMuslObstack,

 		Name:        "musl-obstack",
@@ -32,5 +32,5 @@ func init() {
 		Website:     "https://github.com/void-linux/musl-obstack",

 		ID: 146206,
-	}
+	})
 }
--- a/internal/rosa/musl.go
+++ b/internal/rosa/musl.go
@@ -2,7 +2,7 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newMusl(headers bool) (pkg.Artifact, string) {
+func (s *S) newMusl(t Toolchain, headers bool) (pkg.Artifact, string) {
 	const (
 		version  = "1.2.6"
 		checksum = "WtWb_OV_XxLDAB5NerOL9loLlHVadV00MmGk65PPBU1evaolagoMHfvpZp_vxEzS"
@@ -14,7 +14,7 @@ func (t Toolchain) newMusl(headers bool) (pkg.Artifact, string) {
 		SkipCheck:    true,
 		Script: `
 mkdir -p /work/system/bin
-COMPAT_LINKER_NAME="ld-musl-` + linuxArch() + `.so.1"
+COMPAT_LINKER_NAME="ld-musl-` + s.linuxArch() + `.so.1"
 ln -vs ../lib/libc.so /work/system/bin/linker
 ln -vs ../lib/libc.so /work/system/bin/ldd
 ln -vs libc.so "/work/system/lib/${COMPAT_LINKER_NAME}"
@@ -34,7 +34,7 @@ rmdir -v /work/lib
 	}

 	env := []string{
-		"LDFLAGS=" + earlyLDFLAGS(false),
+		"LDFLAGS=" + s.earlyLDFLAGS(false),
 	}
 	if t.isStage0() {
 		env = append(env,
@@ -44,7 +44,7 @@ rmdir -v /work/lib
 		)
 	}

-	return t.NewPackage(name, version, newTar(
+	return s.NewPackage(t, name, version, newTar(
 		"https://musl.libc.org/releases/musl-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -75,9 +75,9 @@ index 715948f4..c2fece68 100644
 	), version
 }
 func init() {
-	artifactsM[Musl] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newMusl(false)
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.newMusl(t, false)
 		},

 		Name:        "musl",
@@ -85,14 +85,14 @@ func init() {
 		Website:     "https://musl.libc.org/",

 		ID: 11688,
-	}
+	})

-	artifactsM[muslHeaders] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newMusl(true)
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.newMusl(t, true)
 		},

 		Name:        "musl-headers",
 		Description: "system installation of musl headers",
-	}
+	})
 }
--- a/internal/rosa/ncurses.go
+++ b/internal/rosa/ncurses.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newNcurses() (pkg.Artifact, string) {
+func (t Toolchain) newNcurses(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "6.6"
 		checksum = "XvWp4xi6hR_hH8XUoGY26L_pqBSDapJYulhzZqPuR0KNklqypqNc1yNXU-nOjf5w"
 	)
-	return t.NewPackage("ncurses", version, newTar(
+	return s.NewPackage(t, "ncurses", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/ncurses/ncurses-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -26,7 +26,7 @@ func (t Toolchain) newNcurses() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Ncurses] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newNcurses,

 		Name:        "ncurses",
@@ -34,5 +34,5 @@ func init() {
 		Website:     "https://invisible-island.net/ncurses/",

 		ID: 373226,
-	}
+	})
 }
--- a/internal/rosa/netfilter.go
+++ b/internal/rosa/netfilter.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newLibmnl() (pkg.Artifact, string) {
+func (t Toolchain) newLibmnl(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.0.5"
 		checksum = "DN-vbbvQDpxXJm0TJ6xlluILvfrB86avrCTX50XyE9SEFSAZ_o8nuKc5Gu0Am7-u"
 	)
-	return t.NewPackage("libmnl", version, newTar(
+	return s.NewPackage(t, "libmnl", version, newTar(
 		"https://www.netfilter.org/projects/libmnl/files/"+
 			"libmnl-"+version+".tar.bz2",
 		checksum,
@@ -39,7 +39,7 @@ index d223ac2..a7878d0 100644
 	), version
 }
 func init() {
-	artifactsM[Libmnl] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibmnl,

 		Name:        "libmnl",
@@ -47,15 +47,15 @@ func init() {
 		Website:     "https://www.netfilter.org/projects/libmnl/",

 		ID: 1663,
-	}
+	})
 }

-func (t Toolchain) newLibnftnl() (pkg.Artifact, string) {
+func (t Toolchain) newLibnftnl(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.3.1"
 		checksum = "91ou66K-I17iX6DB6hiQkhhC_v4DFW5iDGzwjVRNbJNEmKqowLZBlh3FY-ZDO0r9"
 	)
-	return t.NewPackage("libnftnl", version, t.newTagRemote(
+	return s.NewPackage(t, "libnftnl", version, s.newTagRemote(t,
 		"https://git.netfilter.org/libnftnl",
 		"libnftnl-"+version, checksum,
 	), &PackageAttr{
@@ -77,7 +77,7 @@ func (t Toolchain) newLibnftnl() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libnftnl] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibnftnl,

 		Name:        "libnftnl",
@@ -89,15 +89,15 @@ func init() {
 		},

 		ID: 1681,
-	}
+	})
 }

-func (t Toolchain) newIPTables() (pkg.Artifact, string) {
+func (t Toolchain) newIPTables(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.8.13"
 		checksum = "TUA-cFIAsiMvtRR-XzQvXzoIhJUOc9J2gQDJCbBRjmgmVfGfPTCf58wL7e-cUKVQ"
 	)
-	return t.NewPackage("iptables", version, t.newTagRemote(
+	return s.NewPackage(t, "iptables", version, s.newTagRemote(t,
 		"https://git.netfilter.org/iptables",
 		"v"+version, checksum,
 	), &PackageAttr{
@@ -131,7 +131,7 @@ chmod +w /etc/ && ln -s ../usr/src/iptables/etc/ethertypes /etc/
 	), version
 }
 func init() {
-	artifactsM[IPTables] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newIPTables,

 		Name:        "iptables",
@@ -143,5 +143,5 @@ func init() {
 		},

 		ID: 1394,
-	}
+	})
 }
--- a/internal/rosa/nettle.go
+++ b/internal/rosa/nettle.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newNettle() (pkg.Artifact, string) {
+func (t Toolchain) newNettle(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.0"
 		checksum = "6agC-vHzzoqAlaX3K9tX8yHgrm03HLqPZzVzq8jh_ePbuPMIvpxereu_uRJFmQK7"
 	)
-	return t.NewPackage("nettle", version, newTar(
+	return s.NewPackage(t, "nettle", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/nettle/nettle-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -19,7 +19,7 @@ func (t Toolchain) newNettle() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Nettle] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newNettle,

 		Name:        "nettle",
@@ -31,5 +31,5 @@ func init() {
 		},

 		ID: 2073,
-	}
+	})
 }
--- a/internal/rosa/nettle3.go
+++ b/internal/rosa/nettle3.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newNettle3() (pkg.Artifact, string) {
+func (t Toolchain) newNettle3(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.10.2"
 		checksum = "07aXlj10X5llf67jIqRQAA1pgLSgb0w_JYggZVPuKNoc-B-_usb5Kr8FrfBe7g1S"
 	)
-	return t.NewPackage("nettle", version, newTar(
+	return s.NewPackage(t, "nettle", version, newTar(
 		"https://ftpmirror.gnu.org/gnu/nettle/nettle-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -19,7 +19,7 @@ func (t Toolchain) newNettle3() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[nettle3] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newNettle3,

 		Name:        "nettle3",
@@ -29,5 +29,5 @@ func init() {
 		Dependencies: P{
 			GMP,
 		},
-	}
+	})
 }
--- a/internal/rosa/ninja.go
+++ b/internal/rosa/ninja.go
@@ -2,14 +2,16 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newNinja() (pkg.Artifact, string) {
+func (t Toolchain) newNinja(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.13.2"
 		checksum = "ygKWMa0YV2lWKiFro5hnL-vcKbc_-RACZuPu0Io8qDvgQlZ0dxv7hPNSFkt4214v"
 	)
-	return t.New("ninja-"+version, 0, []pkg.Artifact{
-		t.Load(Python),
-		t.Load(Bash),
+	python, _ := s.Load(t, Python)
+	bash, _ := s.Load(t, Bash)
+	return s.New(t, "ninja-"+version, 0, []pkg.Artifact{
+		python,
+		bash,
 	}, nil, nil, `
 cd "$(mktemp -d)"
 python3 /usr/src/ninja/configure.py \
@@ -28,7 +30,7 @@ cp ninja /work/system/bin/
 			"googletest-1.16.0.tar.gz",
 			"NjLGvSbgPy_B-y-o1hdanlzEzaYeStFcvFGxpYV3KYlhrWWFRcugYhM3ZMzOA9B_",
 			pkg.TarGzip,
-		)), pkg.Path(AbsUsrSrc.Append("ninja"), true, t.NewPatchedSource(
+		)), pkg.Path(AbsUsrSrc.Append("ninja"), true, s.NewPatchedSource(t,
 		"ninja", version, newFromGitHub(
 			"ninja-build/ninja",
 			"v"+version,
@@ -37,7 +39,7 @@ cp ninja /work/system/bin/
 	))), version
 }
 func init() {
-	artifactsM[Ninja] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newNinja,

 		Name:        "ninja",
@@ -45,5 +47,5 @@ func init() {
 		Website:     "https://ninja-build.org/",

 		ID: 2089,
-	}
+	})
 }
--- a/internal/rosa/nss.go
+++ b/internal/rosa/nss.go
@@ -6,7 +6,7 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newNSS() (pkg.Artifact, string) {
+func (t Toolchain) newNSS(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.123.1"
 		checksum = "g811Z_fc74ssg-s6BeXRG-ipSfJggD6hrxjVJxrOBIz98CE7piv0OLwzIRLMQpwR"
@@ -14,7 +14,7 @@ func (t Toolchain) newNSS() (pkg.Artifact, string) {
 		version0  = "4_38_2"
 		checksum0 = "25x2uJeQnOHIiq_zj17b4sYqKgeoU8-IsySUptoPcdHZ52PohFZfGuIisBreWzx0"
 	)
-	return t.NewPackage("nss", version, newFromGitHub(
+	return s.NewPackage(t, "nss", version, newFromGitHub(
 		"nss-dev/nss",
 		"NSS_"+strings.Join(strings.SplitN(version, ".", 3), "_")+"_RTM",
 		checksum,
@@ -67,7 +67,7 @@ cp -r \
 	), version
 }
 func init() {
-	artifactsM[NSS] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newNSS,

 		Name:        "nss",
@@ -79,7 +79,7 @@ func init() {
 		},

 		ID: 2503,
-	}
+	})
 }

 func init() {
@@ -87,7 +87,7 @@ func init() {
 		version  = "0.5.1"
 		checksum = "oxjnuIrPVMPvD6x8VFLqB7EdbfuhouGQdtPuHDpEHGzoyH5nkxqtYN9UthMY9noA"
 	)
-	artifactsM[buildcatrust] = newPythonPackage(
+	native.newPythonPackage(
 		"buildcatrust", 233988,
 		"transform certificate stores between formats",
 		"https://github.com/nix-community/buildcatrust",
@@ -102,8 +102,8 @@ rm buildcatrust/tests/test_nonhermetic.py
 	)
 }

-func (t Toolchain) newNSSCACert() (pkg.Artifact, string) {
-	return t.New("nss-cacert", 0, t.AppendPresets(nil,
+func (t Toolchain) newNSSCACert(s *S) (pkg.Artifact, string) {
+	return s.New(t, "nss-cacert", 0, s.AppendPresets(t, nil,
 		Bash,

 		NSS,
@@ -120,11 +120,11 @@ buildcatrust \
 `), Unversioned
 }
 func init() {
-	artifactsM[NSSCACert] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newNSSCACert,

 		Name:        "nss-cacert",
 		Description: "bundle of X.509 certificates of public Certificate Authorities",
 		Website:     "https://curl.se/docs/caextract.html",
-	}
+	})
 }
--- a/internal/rosa/openssl.go
+++ b/internal/rosa/openssl.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newOpenSSL() (pkg.Artifact, string) {
+func (t Toolchain) newOpenSSL(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.6.2"
 		checksum = "jH004dXTiE01Hp0kyShkWXwrSHEksZi4i_3v47D9H9Uz9LQ1aMwF7mrl2Tb4t_XA"
 	)
-	return t.NewPackage("openssl", version, newFromGitHubRelease(
+	return s.NewPackage(t, "openssl", version, newFromGitHubRelease(
 		"openssl/openssl",
 		"openssl-"+version,
 		"openssl-"+version+".tar.gz",
@@ -40,7 +40,7 @@ func (t Toolchain) newOpenSSL() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[OpenSSL] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newOpenSSL,

 		Name:        "openssl",
@@ -51,5 +51,5 @@ func init() {

 		// strange malformed tags treated as pre-releases in Anitya
 		latest: (*Versions).getStable,
-	}
+	})
 }
--- a/internal/rosa/p11.go
+++ b/internal/rosa/p11.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newP11Kit() (pkg.Artifact, string) {
+func (t Toolchain) newP11Kit(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.26.2"
 		checksum = "3ei-6DUVtYzrRVe-SubtNgRlweXd6H2qHmUu-_5qVyIn6gSTvZbGS2u79Y8IFb2N"
 	)
-	return t.NewPackage("p11-kit", version, t.newTagRemote(
+	return s.NewPackage(t, "p11-kit", version, s.newTagRemote(t,
 		"https://github.com/p11-glue/p11-kit.git",
 		version, checksum,
 	), nil, &MesonHelper{
@@ -23,7 +23,7 @@ func (t Toolchain) newP11Kit() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[P11Kit] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newP11Kit,

 		Name:        "p11-kit",
@@ -36,5 +36,5 @@ func init() {
 		},

 		ID: 2582,
-	}
+	})
 }
--- a/internal/rosa/pcre2.go
+++ b/internal/rosa/pcre2.go
@@ -4,12 +4,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newPCRE2() (pkg.Artifact, string) {
+func (t Toolchain) newPCRE2(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "10.47"
 		checksum = "IbC24vVayju6nB9EhrBPSDexk22wDecdpyrjgC3nCZXkwTnUjq4CD2q5sopqu6CW"
 	)
-	return t.NewPackage("pcre2", version, newFromGitHubRelease(
+	return s.NewPackage(t, "pcre2", version, newFromGitHubRelease(
 		"PCRE2Project/pcre2",
 		"pcre2-"+version,
 		"pcre2-"+version+".tar.bz2",
@@ -32,7 +32,7 @@ ln -s ../system/bin/toybox /bin/echo
 	), version
 }
 func init() {
-	artifactsM[PCRE2] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPCRE2,

 		Name:        "pcre2",
@@ -40,5 +40,5 @@ func init() {
 		Website:     "https://pcre2project.github.io/pcre2/",

 		ID: 5832,
-	}
+	})
 }
--- a/internal/rosa/perl.go
+++ b/internal/rosa/perl.go
@@ -7,12 +7,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newPerl() (pkg.Artifact, string) {
+func (t Toolchain) newPerl(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "5.42.2"
 		checksum = "Me_xFfgkRnVyG0sE6a74TktK2OUq9Z1LVJNEu_9RdZG3S2fbjfzNiuk2SJqHAgbm"
 	)
-	return t.NewPackage("perl", version, newTar(
+	return s.NewPackage(t, "perl", version, newTar(
 		"https://www.cpan.org/src/5.0/perl-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -50,7 +50,7 @@ chmod +w /system/bin && rm -f /system/bin/ps # perl does not like toybox ps
 	}), version
 }
 func init() {
-	artifactsM[Perl] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerl,

 		Name:        "perl",
@@ -61,20 +61,21 @@ func init() {

 		// odd-even versioning
 		latest: (*Versions).getStable,
-	}
+	})
 }

 // newViaPerlModuleBuild installs a perl module via Build.PL.
-func (t Toolchain) newViaPerlModuleBuild(
+func (s *S) newViaPerlModuleBuild(
+	t Toolchain,
 	name, version string,
 	source pkg.Artifact,
 	patches []KV,
-	extra ...PArtifact,
+	extra ...ArtifactH,
 ) pkg.Artifact {
 	if name == "" || version == "" {
 		panic("names must be non-empty")
 	}
-	return t.New("perl-"+name, 0, t.AppendPresets(nil,
+	return s.New(t, "perl-"+name, 0, s.AppendPresets(t, nil,
 		slices.Concat(P{Perl}, extra)...,
 	), nil, nil, `
 cd /usr/src/`+name+`
@@ -82,17 +83,17 @@ perl Build.PL --prefix=/system
 ./Build build
 ./Build test
 ./Build install --destdir=/work
-`, pkg.Path(AbsUsrSrc.Append(name), true, t.NewPatchedSource(
+`, pkg.Path(AbsUsrSrc.Append(name), true, s.NewPatchedSource(t,
 		"perl-"+name, version, source, false, patches...,
 	)))
 }

-func (t Toolchain) newPerlModuleBuild() (pkg.Artifact, string) {
+func (t Toolchain) newPerlModuleBuild(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.4234"
 		checksum = "ZKxEFG4hE1rqZt52zBL2LRZBMkYzhjb5-cTBXcsyA52EbPeeYyVxU176yAea8-Di"
 	)
-	return t.newViaPerlModuleBuild("Module-Build", version, newTar(
+	return s.newViaPerlModuleBuild(t, "Module-Build", version, newTar(
 		"https://cpan.metacpan.org/authors/id/L/LE/LEONT/"+
 			"Module-Build-"+version+".tar.gz",
 		checksum,
@@ -100,7 +101,7 @@ func (t Toolchain) newPerlModuleBuild() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlModuleBuild] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlModuleBuild,

 		Name:        "perl-Module::Build",
@@ -110,17 +111,18 @@ func init() {
 		Dependencies: P{
 			Perl,
 		},
-	}
+	})
 }

 // newViaPerlMakeMaker installs a perl module via Makefile.PL.
-func (t Toolchain) newViaPerlMakeMaker(
+func (s *S) newViaPerlMakeMaker(
+	t Toolchain,
 	name, version string,
 	source pkg.Artifact,
 	patches []KV,
-	extra ...PArtifact,
+	extra ...ArtifactH,
 ) pkg.Artifact {
-	return t.NewPackage("perl-"+name, version, source, &PackageAttr{
+	return s.NewPackage(t, "perl-"+name, version, source, &PackageAttr{
 		// uses source tree as scratch space
 		Writable:    true,
 		Chmod:       true,
@@ -141,12 +143,12 @@ func (t Toolchain) newViaPerlMakeMaker(
 	})...)
 }

-func (t Toolchain) newPerlLocaleGettext() (pkg.Artifact, string) {
+func (t Toolchain) newPerlLocaleGettext(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.07"
 		checksum = "cFq4BKFD1MWSoa7lsrPjpdo9kzPqd0jlRcBFUyL1L1isw8m3D_Sge_ff0MAu_9J3"
 	)
-	return t.newViaPerlMakeMaker("Locale::gettext", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "Locale::gettext", version, newFromCPAN(
 		"PVANDRY",
 		"Locale-gettext",
 		version,
@@ -154,7 +156,7 @@ func (t Toolchain) newPerlLocaleGettext() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlLocaleGettext] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlLocaleGettext,

 		Name:        "perl-Locale::gettext",
@@ -162,15 +164,15 @@ func init() {
 		Website:     "https://metacpan.org/release/Locale-gettext",

 		ID: 7523,
-	}
+	})
 }

-func (t Toolchain) newPerlPodParser() (pkg.Artifact, string) {
+func (t Toolchain) newPerlPodParser(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.67"
 		checksum = "RdURu9mOfExk_loCp6abxlcQV3FycSNbTqhRS9i6JUqnYfGGEgercK30g0gjYyqe"
 	)
-	return t.newViaPerlMakeMaker("Pod::Parser", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "Pod::Parser", version, newFromCPAN(
 		"MAREKR",
 		"Pod-Parser",
 		version,
@@ -178,7 +180,7 @@ func (t Toolchain) newPerlPodParser() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlPodParser] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlPodParser,

 		Name:        "perl-Pod::Parser",
@@ -186,15 +188,15 @@ func init() {
 		Website:     "https://metacpan.org/release/Pod-Parser",

 		ID: 3244,
-	}
+	})
 }

-func (t Toolchain) newPerlSGMLS() (pkg.Artifact, string) {
+func (t Toolchain) newPerlSGMLS(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.1"
 		checksum = "aZijn4MUqD-wfyZgdcCruCwl4SgDdu25cNmJ4_UvdAk9a7uz4gzMQdoeB6DQ6QOy"
 	)
-	return t.newViaPerlMakeMaker("SGMLS", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "SGMLS", version, newFromCPAN(
 		"RAAB",
 		"SGMLSpm",
 		version,
@@ -202,7 +204,7 @@ func (t Toolchain) newPerlSGMLS() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlSGMLS] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlSGMLS,

 		Name:        "perl-SGMLS",
@@ -224,15 +226,15 @@ func init() {
 			}
 			return v.Latest
 		},
-	}
+	})
 }

-func (t Toolchain) newPerlTermReadKey() (pkg.Artifact, string) {
+func (t Toolchain) newPerlTermReadKey(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.38"
 		checksum = "qerL8Xo7kD0f42PZoiEbmE8Roc_S9pOa27LXelY4DN_0UNy_u5wLrGHI8utNlaiI"
 	)
-	return t.newViaPerlMakeMaker("Term::ReadKey", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "Term::ReadKey", version, newFromCPAN(
 		"JSTOWE",
 		"TermReadKey",
 		version,
@@ -240,7 +242,7 @@ func (t Toolchain) newPerlTermReadKey() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlTermReadKey] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlTermReadKey,

 		Name:        "perl-Term::ReadKey",
@@ -248,15 +250,15 @@ func init() {
 		Website:     "https://metacpan.org/release/TermReadKey",

 		ID: 3372,
-	}
+	})
 }

-func (t Toolchain) newPerlTextCharWidth() (pkg.Artifact, string) {
+func (t Toolchain) newPerlTextCharWidth(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.04"
 		checksum = "G2p5RHU4_HiZ23ZusBA_enTlVMxz0J4esUx4CGcOPhY6xYTbp-aXWRN6lYZpzBw2"
 	)
-	return t.newViaPerlMakeMaker("Text::CharWidth", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "Text::CharWidth", version, newFromCPAN(
 		"KUBOTA",
 		"Text-CharWidth",
 		version,
@@ -264,7 +266,7 @@ func (t Toolchain) newPerlTextCharWidth() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlTextCharWidth] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlTextCharWidth,

 		Name:        "perl-Text::CharWidth",
@@ -272,15 +274,15 @@ func init() {
 		Website:     "https://metacpan.org/release/Text-CharWidth",

 		ID: 14380,
-	}
+	})
 }

-func (t Toolchain) newPerlTextWrapI18N() (pkg.Artifact, string) {
+func (t Toolchain) newPerlTextWrapI18N(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.06"
 		checksum = "Vmo89qLgxUqyQ6QmWJVqu60aQAUjrNKRjFQSXGnvClxofzRjiCa6idzPgJ4VkixM"
 	)
-	return t.newViaPerlMakeMaker("Text::WrapI18N", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "Text::WrapI18N", version, newFromCPAN(
 		"KUBOTA",
 		"Text-WrapI18N",
 		version,
@@ -290,7 +292,7 @@ func (t Toolchain) newPerlTextWrapI18N() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[PerlTextWrapI18N] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlTextWrapI18N,

 		Name:        "perl-Text::WrapI18N",
@@ -302,15 +304,15 @@ func init() {
 		},

 		ID: 14385,
-	}
+	})
 }

-func (t Toolchain) newPerlMIMECharset() (pkg.Artifact, string) {
+func (t Toolchain) newPerlMIMECharset(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.013.1"
 		checksum = "Ou_ukcrOa1cgtE3mptinb-os3bdL1SXzbRDFZQF3prrJj-drc3rp_huay7iDLJol"
 	)
-	return t.newViaPerlMakeMaker("MIME::Charset", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "MIME::Charset", version, newFromCPAN(
 		"NEZUMI",
 		"MIME-Charset",
 		version,
@@ -318,7 +320,7 @@ func (t Toolchain) newPerlMIMECharset() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlMIMECharset] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlMIMECharset,

 		Name:        "perl-MIME::Charset",
@@ -326,15 +328,15 @@ func init() {
 		Website:     "https://metacpan.org/release/MIME-Charset",

 		ID: 3070,
-	}
+	})
 }

-func (t Toolchain) newPerlUnicodeLineBreak() (pkg.Artifact, string) {
+func (t Toolchain) newPerlUnicodeLineBreak(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2019.001"
 		checksum = "ZHVkh7EDgAUHnTpvXsnPAuWpgNoBImtY_9_8TIbo2co_WgUwEb0MtXPhI8pAZ5OH"
 	)
-	return t.newViaPerlMakeMaker("Unicode::LineBreak", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "Unicode::LineBreak", version, newFromCPAN(
 		"NEZUMI",
 		"Unicode-LineBreak",
 		version,
@@ -344,7 +346,7 @@ func (t Toolchain) newPerlUnicodeLineBreak() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[PerlUnicodeLineBreak] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlUnicodeLineBreak,

 		Name:        "perl-Unicode::LineBreak",
@@ -356,15 +358,15 @@ func init() {
 		},

 		ID: 6033,
-	}
+	})
 }

-func (t Toolchain) newPerlYAMLTiny() (pkg.Artifact, string) {
+func (t Toolchain) newPerlYAMLTiny(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.76"
 		checksum = "V1MV4KPym1LxSw8CRXqPR3K-l1hGHbT5Ob4t-9xju6R9X_CWyw6hI8wsMaNdHdBY"
 	)
-	return t.newViaPerlMakeMaker("YAML::Tiny", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "YAML::Tiny", version, newFromCPAN(
 		"ETHER",
 		"YAML-Tiny",
 		version,
@@ -372,7 +374,7 @@ func (t Toolchain) newPerlYAMLTiny() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlYAMLTiny] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlYAMLTiny,

 		Name:        "perl-YAML::Tiny",
@@ -380,15 +382,15 @@ func init() {
 		Website:     "https://metacpan.org/release/YAML-Tiny",

 		ID: 3549,
-	}
+	})
 }

-func (t Toolchain) newPerlTestCmd() (pkg.Artifact, string) {
+func (t Toolchain) newPerlTestCmd(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.09"
 		checksum = "gpGUwyC9IozDiYSgW_kXARNfXsTPFa6cTowJmmCBbPqcs2-pONZca_SB06FGy-7H"
 	)
-	return t.newViaPerlMakeMaker("Test::Cmd", version, newFromCPAN(
+	return s.newViaPerlMakeMaker(t, "Test::Cmd", version, newFromCPAN(
 		"NEILB",
 		"Test-Cmd",
 		version,
@@ -396,7 +398,7 @@ func (t Toolchain) newPerlTestCmd() (pkg.Artifact, string) {
 	), nil), version
 }
 func init() {
-	artifactsM[PerlTestCmd] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPerlTestCmd,

 		Name:        "perl-Test::Cmd",
@@ -404,5 +406,5 @@ func init() {
 		Website:     "https://metacpan.org/release/Test-Cmd",

 		ID: 6014,
-	}
+	})
 }
--- a/internal/rosa/pixman.go
+++ b/internal/rosa/pixman.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newPixman() (pkg.Artifact, string) {
+func (t Toolchain) newPixman(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.46.4"
 		checksum = "iECDxLG9SxUrvGHqeDoaBa-b3uqdT5DC4zudjtrwb8Wodq82pyacmFNEAo4SDsiE"
 	)
-	return t.NewPackage("pixman", version, newFromGitLab(
+	return s.NewPackage(t, "pixman", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"pixman/pixman",
 		"pixman-"+version,
@@ -19,7 +19,7 @@ func (t Toolchain) newPixman() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Pixman] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPixman,

 		Name:        "pixman",
@@ -27,5 +27,5 @@ func init() {
 		Website:     "https://pixman.org/",

 		ID: 3648,
-	}
+	})
 }
--- a/internal/rosa/pkg-config.go
+++ b/internal/rosa/pkg-config.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newPkgConfig() (pkg.Artifact, string) {
+func (t Toolchain) newPkgConfig(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.29.2"
 		checksum = "6UsGqEMA8EER_5b9N0b32UCqiRy39B6_RnPfvuslWhtFV1qYD4DfS10crGZN_TP2"
 	)
-	return t.NewPackage("pkg-config", version, newFromGitLab(
+	return s.NewPackage(t, "pkg-config", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"pkg-config/pkg-config",
 		"pkg-config-"+version,
@@ -24,7 +24,7 @@ func (t Toolchain) newPkgConfig() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[PkgConfig] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPkgConfig,

 		Name:        "pkg-config",
@@ -32,5 +32,5 @@ func init() {
 		Website:     "https://pkgconfig.freedesktop.org/",

 		ID: 3649,
-	}
+	})
 }
--- a/internal/rosa/procps.go
+++ b/internal/rosa/procps.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newProcps() (pkg.Artifact, string) {
+func (t Toolchain) newProcps(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.0.6"
 		checksum = "pl_fZLvDlv6iZTkm8l_tHFpzTDVFGCiSJEs3eu0zAX6u36AV36P_En8K7JPScRWM"
 	)
-	return t.NewPackage("procps", version, newFromGitLab(
+	return s.NewPackage(t, "procps", version, newFromGitLab(
 		"gitlab.com",
 		"procps-ng/procps",
 		"v"+version,
@@ -27,7 +27,7 @@ func (t Toolchain) newProcps() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Procps] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newProcps,

 		Name:        "procps",
@@ -35,5 +35,5 @@ func init() {
 		Website:     "https://gitlab.com/procps-ng/procps",

 		ID: 3708,
-	}
+	})
 }
--- a/internal/rosa/python.go
+++ b/internal/rosa/python.go
@@ -7,12 +7,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newPython() (pkg.Artifact, string) {
+func (t Toolchain) newPython(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.14.5"
 		checksum = "zYIpDlk2ftZ-UVGCQS1rthle2OHoyXV653ztWiopKV1NhmIJf1K2hHbkwM4DozQ9"
 	)
-	return t.NewPackage("python", version, newTar(
+	return s.NewPackage(t, "python", version, newTar(
 		"https://www.python.org/ftp/python/"+version+
 			"/Python-"+version+".tgz",
 		checksum,
@@ -73,7 +73,7 @@ index 19aea290b58..51603ba9510 100644

 			// _ctypes appears to infer something from the linker name
 			"LDFLAGS=-Wl,--dynamic-linker=/system/lib/" +
-				"ld-musl-" + linuxArch() + ".so.1",
+				"ld-musl-" + s.linuxArch() + ".so.1",
 		},
 	}, &MakeHelper{
 		Check: []string{"test"},
@@ -88,7 +88,7 @@ index 19aea290b58..51603ba9510 100644
 	), version
 }
 func init() {
-	artifactsM[Python] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newPython,

 		Name:        "python",
@@ -103,7 +103,7 @@ func init() {
 		},

 		ID: 13254,
-	}
+	})
 }

 // PipHelper is the [Python] pip packaging helper.
@@ -150,7 +150,7 @@ func (*PipHelper) createDir() bool { return false }
 func (*PipHelper) wantsDir() string { return `"$(mktemp -d)"` }

 // script generates the pip3 install command.
-func (attr *PipHelper) script(name string) string {
+func (attr *PipHelper) script(_ *S, name string) string {
 	if attr == nil {
 		attr = new(PipHelper)
 	}
@@ -193,16 +193,16 @@ pip3 install \
 ` + script
 }

-// newPythonPackage creates [Metadata] for a [Python] package.
-func newPythonPackage(
+// newPythonPackage registers a new [Python] package.
+func (s *S) newPythonPackage(
 	name string, id int, description, website, version string,
 	source pkg.Artifact, attrP *PackageAttr, attr *PipHelper,
-	build P, extra ...PArtifact,
-) Metadata {
+	build P, extra ...ArtifactH,
+) {
 	name = "python-" + name
-	return Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.NewPackage(name, version, source, attrP, attr, slices.Concat(
+	s.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.NewPackage(t, name, version, source, attrP, attr, slices.Concat(
 				P{Python},
 				extra,
 				build,
@@ -216,7 +216,7 @@ func newPythonPackage(
 		Dependencies: slices.Concat(P{Python}, extra),

 		ID: id,
-	}
+	})
 }

 func init() {
@@ -224,7 +224,7 @@ func init() {
 		version  = "0.47.0"
 		checksum = "HZ-MvkUP8mbbx2YmsRNswj_bbOCIiXckuHqL5Qbvb5NxN5DYfWnqwkGNyS7OrId0"
 	)
-	artifactsM[PythonWheel] = newPythonPackage(
+	native.newPythonPackage(
 		"wheel", 11428,
 		"the official binary distribution format for Python",
 		"https://peps.python.org/pep-0427/",
@@ -242,7 +242,7 @@ func init() {
 		version  = "82.0.1"
 		checksum = "nznP46Tj539yqswtOrIM4nQgwLA1h-ApKX7z7ghazROCpyF5swtQGwsZoI93wkhc"
 	)
-	artifactsM[PythonSetuptools] = newPythonPackage(
+	native.newPythonPackage(
 		"setuptools", 4021,
 		"the autotools of the Python ecosystem",
 		"https://pypi.org/project/setuptools/",
@@ -262,7 +262,7 @@ func init() {
 		version  = "1.1.1"
 		checksum = "rXZixTsZcRcIoUC1LvWrjySsiXSv5uhW6ng2P-yXZrbdj7FrSrDeJLCfC2b-ladV"
 	)
-	artifactsM[PythonVCSVersioning] = newPythonPackage(
+	native.newPythonPackage(
 		"vcs-versioning", 389421,
 		"core VCS versioning functionality extracted as a standalone library",
 		"https://setuptools-scm.readthedocs.io/en/latest/",
@@ -289,7 +289,7 @@ func init() {
 		version  = "10.0.5"
 		checksum = "vTN_TPd-b4Wbsw5WmAcsWjrs-FNXXznOeVTDnb54NtXve9Oy-eb2HPy-RG3FzNqp"
 	)
-	artifactsM[PythonSetuptoolsSCM] = newPythonPackage(
+	native.newPythonPackage(
 		"setuptools-scm", 7874,
 		"extracts Python package versions from Git or Mercurial metadata",
 		"https://setuptools-scm.readthedocs.io/en/latest/",
@@ -316,7 +316,7 @@ func init() {
 		version  = "3.12.0"
 		checksum = "VcTsiGiDU1aPLbjSPe38f9OjJDCLcxFz9loObJqUI1ZxDHXAaQMxBpNyLz_G1Rff"
 	)
-	artifactsM[PythonFlitCore] = newPythonPackage(
+	native.newPythonPackage(
 		"flit-core", 44841,
 		"a PEP 517 build backend for packages using Flit",
 		"https://flit.pypa.io/",
@@ -337,7 +337,7 @@ func init() {
 		version  = "26.2"
 		checksum = "rdpGa2EkPFbj1mFtLKLnSwIX9gPfELcuneiICjRVDNw6By49szTFVoW8gtMMZ6ZS"
 	)
-	artifactsM[PythonPackaging] = newPythonPackage(
+	native.newPythonPackage(
 		"packaging", 60461,
 		"reusable core utilities for various Python Packaging interoperability specifications",
 		"https://packaging.pypa.io/",
@@ -352,10 +352,10 @@ func init() {
 }

 func init() {
-	artifactsM[LIT] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			version := t.Version(LLVM)
-			return t.NewPackage("lit", version, t.Load(llvmSource), nil, &PipHelper{
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			source, version := s.Load(t, llvmSource)
+			return s.NewPackage(t, "lit", version, source, nil, &PipHelper{
 				Append: []string{"llvm", "utils", "lit"},
 				// already checked during llvm
 				SkipCheck: true,
@@ -371,7 +371,7 @@ func init() {
 		Dependencies: P{
 			Python,
 		},
-	}
+	})
 }

 func init() {
@@ -379,7 +379,7 @@ func init() {
 		version  = "1.1.1"
 		checksum = "1fVwoal6FoKXczoG3qRUi87TxSWESSGcgvnbEZDYuaOgsO25o36iF3SbAhwkr4Va"
 	)
-	artifactsM[PythonPathspec] = newPythonPackage(
+	native.newPythonPackage(
 		"pathspec", 23424,
 		"utility library for gitignore style pattern matching of file paths",
 		"https://github.com/cpburnz/python-pathspec",
@@ -398,7 +398,7 @@ func init() {
 		version  = "2026.5.7.17"
 		checksum = "1Fcps0gK9P4ofwGL8MISN9k1Q40-quxX7NDpIna50TmziBNrZy-0Vz0I9yIeHCoP"
 	)
-	artifactsM[PythonTroveClassifiers] = newPythonPackage(
+	native.newPythonPackage(
 		"trove-classifiers", 88298,
 		"canonical source for classifiers on PyPI",
 		"https://pypi.org/p/trove-classifiers/",
@@ -417,7 +417,7 @@ func init() {
 		version  = "1.6.0"
 		checksum = "GiUgDkKjF8Xn1cmq6iMhTGXzcPIYeaJrvQpHBSAJapNVx4UyuiTXqd5eVlxSClJu"
 	)
-	artifactsM[PythonPluggy] = newPythonPackage(
+	native.newPythonPackage(
 		"pluggy", 7500,
 		"the core framework used by the pytest, tox, and devpi projects",
 		"https://pluggy.readthedocs.io/en/latest/",
@@ -440,7 +440,7 @@ func init() {
 		version  = "1.16.5"
 		checksum = "V2eREtqZLZeV85yb4O-bfAJCUluHcQP76Qfs0QH5s7RF_Oc8xIP8jD0jl85qFyWk"
 	)
-	artifactsM[PythonHatchling] = newPythonPackage(
+	native.newPythonPackage(
 		"hatchling", 16137,
 		"the extensible, standards compliant build backend used by Hatch",
 		"https://hatch.pypa.io/latest/",
@@ -465,7 +465,7 @@ func init() {
 		version  = "2.20.0"
 		checksum = "L-2P6vn7c_CNZYliE5CJAWLxO1ziDQVVkf8bnZbHj8aSCQ43oWv11wC9KzU9MeCa"
 	)
-	artifactsM[PythonPygments] = newPythonPackage(
+	native.newPythonPackage(
 		"pygments", 3986,
 		"a syntax highlighting package written in Python",
 		"https://pygments.org/",
@@ -484,7 +484,7 @@ func init() {
 		version  = "2.3.0"
 		checksum = "mH7VBZaXcYatBPE3RQQZvSzz_Ay8IPPek60NpPHZulPq4ReAFUUsA4EPWfiyMknZ"
 	)
-	artifactsM[PythonIniConfig] = newPythonPackage(
+	native.newPythonPackage(
 		"iniconfig", 114778,
 		"a small and simple INI-file parser module",
 		"https://github.com/pytest-dev/iniconfig",
@@ -507,7 +507,7 @@ func init() {
 		version  = "9.0.3"
 		checksum = "qfLL_znWhbJCDbNJvrx9H3-orJ86z4ifhaW0bIn21jl2sDP-FVoX_1yieOypArQe"
 	)
-	artifactsM[PythonPyTest] = newPythonPackage(
+	native.newPythonPackage(
 		"pytest", 3765,
 		"the pytest framework",
 		"https://pytest.org",
@@ -534,7 +534,7 @@ func init() {
 		version  = "3.0.3"
 		checksum = "txRGYdWE3his1lHHRI-lZADw0-ILvUg2l5OGdFHtFXIb_QowGxwdxHCUSJIgmjQs"
 	)
-	artifactsM[PythonMarkupSafe] = newPythonPackage(
+	native.newPythonPackage(
 		"markupsafe", 3918,
 		"implements a text object that escapes characters so it is safe to use in HTML and XML",
 		"https://markupsafe.palletsprojects.com/",
@@ -553,7 +553,7 @@ func init() {
 		version  = "1.3.12"
 		checksum = "OZbBsQe2MzRuAo5Mr4qRwWHGqU1EEZeBuSprDDIceAtMLIUJtO7SbERlxHIxNhLk"
 	)
-	artifactsM[PythonMako] = newPythonPackage(
+	native.newPythonPackage(
 		"mako", 3915,
 		"a template library written in Python",
 		"https://www.makotemplates.org/",
@@ -571,7 +571,7 @@ func init() {
 		version  = "6.0.3"
 		checksum = "7wDv0RW9chBdu9l5Q4Hun5F2HHdo105ZSIixwdFPKbEYbftW9YxmsegfL-zafnbJ"
 	)
-	artifactsM[PythonPyYAML] = newPythonPackage(
+	native.newPythonPackage(
 		"pyyaml", 4123,
 		"a YAML parser and emitter for Python",
 		"https://pyyaml.org/",
@@ -590,7 +590,7 @@ func init() {
 		version  = "3.00"
 		checksum = "4qfCMFKp0fLsRsloOAF780tXX_Ce_68RwinCmjNGObAX32WpF_iBafIKW1S1bYlA"
 	)
-	artifactsM[PythonPycparser] = newPythonPackage(
+	native.newPythonPackage(
 		"pycparser", 8175,
 		"complete C99 parser in pure Python",
 		"https://github.com/eliben/pycparser",
--- a/internal/rosa/qemu.go
+++ b/internal/rosa/qemu.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newQEMU() (pkg.Artifact, string) {
+func (t Toolchain) newQEMU(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "11.0.0"
 		checksum = "C64gdi_Tkdg2fTwD9ERxtWGcf8vNn_6UvczW0c-x0KW1NZtd3NbEOIrlDhYGn15n"
 	)
-	return t.NewPackage("qemu", version, newTar(
+	return s.NewPackage(t, "qemu", version, newTar(
 		"https://download.qemu.org/qemu-"+version+".tar.bz2",
 		checksum,
 		pkg.TarBzip2,
@@ -94,7 +94,7 @@ EOF
 	), version
 }
 func init() {
-	artifactsM[QEMU] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newQEMU,

 		Name:        "qemu",
@@ -107,5 +107,5 @@ func init() {
 		},

 		ID: 13607,
-	}
+	})
 }
--- a/internal/rosa/rdfind.go
+++ b/internal/rosa/rdfind.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newRdfind() (pkg.Artifact, string) {
+func (t Toolchain) newRdfind(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.8.0"
 		checksum = "PoaeJ2WIG6yyfe5VAYZlOdAQiR3mb3WhAUMj2ziTCx_IIEal4640HMJUb4SzU9U3"
 	)
-	return t.NewPackage("rdfind", version, newTar(
+	return s.NewPackage(t, "rdfind", version, newTar(
 		"https://rdfind.pauldreik.se/rdfind-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -21,7 +21,7 @@ ln -s ../system/bin/toybox /bin/echo
 	), version
 }
 func init() {
-	artifactsM[Rdfind] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newRdfind,

 		Name:        "rdfind",
@@ -33,5 +33,5 @@ func init() {
 		},

 		ID: 231641,
-	}
+	})
 }
--- a/internal/rosa/report.go
+++ b/internal/rosa/report.go
@@ -32,10 +32,14 @@ func WriteReport(msg message.Msg, w io.Writer, c *pkg.Cache) error {
 		zero [wordSize]byte
 		buf  [len(pkg.ID{}) + wordSize]byte
 	)
-	for i := range PresetEnd {
-		a := Std.Load(PArtifact(i))
+	for _, p := range native.Collect() {
+		a, _ := native.Load(Std, p)
+		meta := native.Get(p)
+		if meta == nil {
+			return errors.New("artifact " + p.String() + " in inconsistent state")
+		}
 		if _, ok := a.(pkg.FileArtifact); ok {
-			msg.Verbosef("skipping file artifact %s", artifactsM[i].Name)
+			msg.Verbosef("skipping file artifact %s", meta.Name)
 			continue
 		}

@@ -44,7 +48,7 @@ func WriteReport(msg message.Msg, w io.Writer, c *pkg.Cache) error {
 		var f *os.File
 		if r, err := c.OpenStatus(a); err != nil {
 			if errors.Is(err, os.ErrNotExist) {
-				msg.Verbosef("artifact %s unavailable", artifactsM[i].Name)
+				msg.Verbosef("artifact %s unavailable", meta.Name)
 				continue
 			}
 			return err
@@ -52,7 +56,7 @@ func WriteReport(msg message.Msg, w io.Writer, c *pkg.Cache) error {
 			f = r.(*os.File)
 		}

-		msg.Verbosef("writing artifact %s...", artifactsM[i].Name)
+		msg.Verbosef("writing artifact %s...", meta.Name)

 		var sz int64
 		if fi, err := f.Stat(); err != nil {
--- a/internal/rosa/rosa.go
+++ b/internal/rosa/rosa.go
@@ -2,7 +2,6 @@
 package rosa

 import (
-	"errors"
 	"path"
 	"slices"
 	"strconv"
@@ -54,8 +53,8 @@ var (
 )

 // linuxArch returns the architecture name used by linux corresponding to arch.
-func linuxArch() string {
-	switch arch {
+func (s *S) linuxArch() string {
+	switch s.arch {
 	case "amd64":
 		return "x86_64"
 	case "arm64":
@@ -64,23 +63,23 @@ func linuxArch() string {
 		return "riscv64"

 	default:
-		panic("unsupported target " + arch)
+		panic("unsupported target " + s.arch)
 	}
 }

-// triplet returns the Rosa OS host triple corresponding to arch.
-func triplet() string {
-	return linuxArch() + "-rosa-linux-musl"
+// triple returns the Rosa OS host triple corresponding to arch.
+func (s *S) triple() string {
+	return s.linuxArch() + "-rosa-linux-musl"
 }

 // perArch is a value that differs per architecture.
 type perArch[T any] map[string]T

 // unwrap returns the value for the current architecture.
-func (p perArch[T]) unwrap() T {
-	v, ok := p[arch]
+func (p perArch[T]) unwrap(s *S) T {
+	v, ok := p[s.arch]
 	if !ok {
-		panic("unsupported target " + arch)
+		panic("unsupported target " + s.arch)
 	}
 	return v
 }
@@ -91,18 +90,18 @@ const (
 )

 // earlyLDFLAGS returns LDFLAGS corresponding to triplet.
-func earlyLDFLAGS(static bool) string {
-	s := "-fuse-ld=lld " +
+func (s *S) earlyLDFLAGS(static bool) string {
+	p := "-fuse-ld=lld " +
 		"-L/system/lib -Wl,-rpath=/system/lib " +
-		"-L/system/lib/" + triplet() + " " +
-		"-Wl,-rpath=/system/lib/" + triplet() + " " +
+		"-L/system/lib/" + s.triple() + " " +
+		"-Wl,-rpath=/system/lib/" + s.triple() + " " +
 		"-rtlib=compiler-rt " +
 		"-unwindlib=libunwind " +
 		"-Wl,--as-needed"
 	if !static {
-		s += " -Wl,--dynamic-linker=/system/bin/linker"
+		p += " -Wl,--dynamic-linker=/system/bin/linker"
 	}
-	return s
+	return p
 }

 // Toolchain denotes the infrastructure to compile a [pkg.Artifact] on.
@@ -224,27 +223,9 @@ const (
 	THostNet
 )

-var (
-	// gentooStage3 is the url of a Gentoo stage3 tarball.
-	gentooStage3 string
-	// gentooStage3Checksum is the expected checksum of gentooStage3.
-	gentooStage3Checksum pkg.Checksum
-)
-
-// SetGentooStage3 sets the Gentoo stage3 tarball url and checksum. It panics
-// if given zero values or if these values have already been set.
-func SetGentooStage3(url string, checksum pkg.Checksum) {
-	if gentooStage3 != "" {
-		panic(errors.New("attempting to set Gentoo stage3 url twice"))
-	}
-	if url == "" {
-		panic(errors.New("attempting to set Gentoo stage3 url to the zero value"))
-	}
-	gentooStage3, gentooStage3Checksum = url, checksum
-}
-
-// New returns a [pkg.Artifact] compiled on this toolchain.
-func (t Toolchain) New(
+// New returns a [pkg.Artifact] based on a [Toolchain] via s.
+func (s *S) New(
+	t Toolchain,
 	name string,
 	flag int,
 	extra []pkg.Artifact,
@@ -260,7 +241,7 @@ func (t Toolchain) New(
 	switch t {
 	case _toolchainBusybox:
 		name += "-early"
-		support = slices.Concat([]pkg.Artifact{newBusyboxBin()}, extra)
+		support = slices.Concat([]pkg.Artifact{s.newBusyboxBin()}, extra)
 		env = fixupEnviron(env, nil, "/system/bin")

 	case toolchainGentoo, toolchainStage0:
@@ -268,9 +249,10 @@ func (t Toolchain) New(
 		support = append(support, extra...)
 		support = append(support, cureEtc{})
 		if t == toolchainStage0 {
-			support = append(support, t.Load(stage0Dist))
+			a, _ := s.Load(t, stage0Dist)
+			support = append(support, a)
 		} else {
-			support = append(support, _toolchainBusybox.New("gentoo", 0, nil, nil, nil, `
+			support = append(support, s.New(_toolchainBusybox, "gentoo", 0, nil, nil, nil, `
 tar -C /work -xf /usr/src/stage3.tar.xz
 rm -rf /work/dev/ /work/proc/
 ln -vs ../usr/bin /work/bin
@@ -281,15 +263,15 @@ mkdir -vp /work/system/bin
 	.)
 `, pkg.Path(AbsUsrSrc.Append("stage3.tar.xz"), false,
 				pkg.NewHTTPGet(
-					nil, gentooStage3,
-					gentooStage3Checksum,
+					nil, s.gentooStage3,
+					s.gentooStage3Checksum,
 				),
 			)))
 		}
 		env = fixupEnviron(env, []string{
-			EnvTriplet + "=" + triplet(),
+			EnvTriplet + "=" + s.triple(),
 			lcMessages,
-			"LDFLAGS=" + earlyLDFLAGS(true),
+			"LDFLAGS=" + s.earlyLDFLAGS(true),
 		}, "/system/bin",
 			"/usr/bin",
 		)
@@ -310,7 +292,7 @@ mkdir -vp /work/system/bin
 			base = Musl
 		}

-		support = slices.Concat(extra, (t-1).AppendPresets([]pkg.Artifact{
+		support = slices.Concat(extra, s.AppendPresets(t-1, []pkg.Artifact{
 			cureEtc{newIANAEtc()},
 		},
 			base,
@@ -318,7 +300,7 @@ mkdir -vp /work/system/bin
 			toybox,
 		))
 		env = fixupEnviron(env, []string{
-			EnvTriplet + "=" + triplet(),
+			EnvTriplet + "=" + s.triple(),
 			lcMessages,
 		}, "/system/bin", "/bin")

@@ -327,7 +309,7 @@ mkdir -vp /work/system/bin
 	}

 	return pkg.NewExec(
-		name, arch, knownChecksum, pkg.ExecTimeoutMax,
+		name, s.arch, knownChecksum, pkg.ExecTimeoutMax,
 		flag&THostNet != 0,
 		flag&TExclusive != 0,
 		fhs.AbsRoot, env,
@@ -346,7 +328,8 @@ mkdir -vp /work/system/bin

 // NewPatchedSource returns [pkg.Artifact] of source with patches applied. If
 // passthrough is true, source is returned as is for zero length patches.
-func (t Toolchain) NewPatchedSource(
+func (s *S) NewPatchedSource(
+	t Toolchain,
 	name, version string,
 	source pkg.Artifact,
 	passthrough bool,
@@ -379,7 +362,7 @@ cat /usr/src/` + name + `-patches/* | \
 `
 		aname += "-patched"
 	}
-	return t.New(aname, 0, t.AppendPresets(nil,
+	return s.New(t, aname, 0, s.AppendPresets(t, nil,
 		Patch,
 	), nil, nil, script, paths...)
 }
@@ -407,7 +390,7 @@ type Helper interface {
 	// also empty. The special value helperInPlace omits the cd statement.
 	wantsDir() string
 	// script returns the helper-specific segment of cure script.
-	script(name string) string
+	script(s *S, name string) string
 }

 // PackageAttr holds build-system-agnostic attributes.
@@ -436,55 +419,59 @@ type PackageAttr struct {
 	Flag int
 }

-// pa holds whether a [PArtifact] is present.
-type pa = [PresetEnd]bool
+// pa holds whether an [ArtifactH] is present.
+type pa = map[ArtifactH]struct{}

 // paPool holds addresses of pa.
-var paPool = sync.Pool{New: func() any { return new(pa) }}
+var paPool = sync.Pool{New: func() any { return make(pa) }}

 // paGet returns the address of a new pa.
-func paGet() *pa { return paPool.Get().(*pa) }
+func paGet() pa { return paPool.Get().(pa) }

 // paPut returns a pa to paPool.
-func paPut(pv *pa) { *pv = pa{}; paPool.Put(pv) }
+func paPut(pv pa) { clear(pv); paPool.Put(pv) }

 // appendPreset recursively appends a [PArtifact] and its runtime dependencies.
-func (t Toolchain) appendPreset(
+func (s *S) appendPreset(
+	t Toolchain,
 	a []pkg.Artifact,
-	pv *pa, p PArtifact,
+	pv pa, p ArtifactH,
 ) []pkg.Artifact {
-	if pv[p] {
+	if _, ok := pv[p]; ok {
 		return a
 	}
-	pv[p] = true
+	pv[p] = struct{}{}

-	for _, d := range GetMetadata(p).Dependencies {
-		a = t.appendPreset(a, pv, d)
+	for _, d := range s.Get(p).Dependencies {
+		a = s.appendPreset(t, a, pv, d)
 	}
-	return append(a, t.Load(p))
+	d, _ := s.Load(t, p)
+	return append(a, d)
 }

 // AppendPresets recursively appends multiple [PArtifact] and their runtime
 // dependencies.
-func (t Toolchain) AppendPresets(
+func (s *S) AppendPresets(
+	t Toolchain,
 	a []pkg.Artifact,
-	presets ...PArtifact,
+	presets ...ArtifactH,
 ) []pkg.Artifact {
 	pv := paGet()
 	for _, p := range presets {
-		a = t.appendPreset(a, pv, p)
+		a = s.appendPreset(t, a, pv, p)
 	}
 	paPut(pv)
 	return a
 }

 // NewPackage constructs a [pkg.Artifact] via a build system helper.
-func (t Toolchain) NewPackage(
+func (s *S) NewPackage(
+	t Toolchain,
 	name, version string,
 	source pkg.Artifact,
 	attr *PackageAttr,
 	helper Helper,
-	extra ...PArtifact,
+	extra ...ArtifactH,
 ) pkg.Artifact {
 	if attr == nil {
 		attr = new(PackageAttr)
@@ -501,10 +488,10 @@ func (t Toolchain) NewPackage(
 	{
 		pv := paGet()
 		for _, p := range helper.extra(attr.Flag) {
-			extraRes = t.appendPreset(extraRes, pv, p)
+			extraRes = s.appendPreset(t, extraRes, pv, p)
 		}
 		for _, p := range extra {
-			extraRes = t.appendPreset(extraRes, pv, p)
+			extraRes = s.appendPreset(t, extraRes, pv, p)
 		}
 		paPut(pv)
 	}
@@ -548,18 +535,19 @@ cd '/usr/src/` + name + `/'
 		panic("cannot remain in root")
 	}

-	return t.New(
+	return s.New(
+		t,
 		name+"-"+version,
 		attr.Flag,
 		extraRes,
 		attr.KnownChecksum,
 		attr.Env,
-		scriptEarly+helper.script(name),
+		scriptEarly+helper.script(s, name),
 		slices.Concat(attr.Paths, []pkg.ExecPath{
 			pkg.Path(AbsUsrSrc.Append(
 				name+sourceSuffix,
-			), attr.Writable || wantsWrite, t.NewPatchedSource(
-				name, version, source, !attr.Chmod && !wantsChmod, attr.Patches...,
+			), attr.Writable || wantsWrite, s.NewPatchedSource(
+				t, name, version, source, !attr.Chmod && !wantsChmod, attr.Patches...,
 			)),
 		})...,
 	)
@@ -626,3 +614,8 @@ func newFromGitHubRelease(
 		compression,
 	)
 }
+
+var native S
+
+// Native returns the global [S].
+func Native() *S { return &native }
--- a/internal/rosa/rosa_test.go
+++ b/internal/rosa/rosa_test.go
@@ -28,7 +28,7 @@ var (
 )

 func TestMain(m *testing.M) {
-	rosa.DropCaches("", rosa.OptLLVMNoLTO)
+	rosa.Native().DropCaches("", rosa.OptLLVMNoLTO)
 	container.TryArgv0(nil)

 	code := m.Run()
@@ -77,10 +77,9 @@ func TestCureAll(t *testing.T) {
 	cache := getCache(t)
 	t.Parallel()

-	for i := range rosa.PresetEnd {
-		p := rosa.PArtifact(i)
-		meta := rosa.GetMetadata(p)
-		a := rosa.Std.Load(p)
+	for _, p := range rosa.Native().Collect() {
+		a, _ := rosa.Native().Load(rosa.Std, p)
+		meta := rosa.Native().MustGet(p)
 		t.Run(meta.Name, func(t *testing.T) {
 			t.Parallel()

@@ -94,14 +93,13 @@ func TestCureAll(t *testing.T) {
 }

 func BenchmarkStage3(b *testing.B) {
-	arch, flags := rosa.Arch(), rosa.Flags()
-	b.Cleanup(func() { rosa.DropCaches(arch, flags) })
+	s := rosa.Native().Clone()

 	for b.Loop() {
-		rosa.Std.Load(rosa.LLVM)
+		s.Load(rosa.Std, rosa.LLVM)

 		b.StopTimer()
-		rosa.DropCaches("", 0)
+		s.DropCaches("", 0)
 		b.StartTimer()
 	}
 }
--- a/internal/rosa/rsync.go
+++ b/internal/rosa/rsync.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newRsync() (pkg.Artifact, string) {
+func (t Toolchain) newRsync(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "3.4.2"
 		checksum = "t7PxS4WHXzefLMKKc_3hJgxUmlGG6KgHMZ8i4DZvCQAUAizxbclNKwfLyOHyq5BX"
 	)
-	return t.NewPackage("rsync", version, newTar(
+	return s.NewPackage(t, "rsync", version, newTar(
 		"https://download.samba.org/pub/rsync/src/"+
 			"rsync-"+version+".tar.gz",
 		checksum,
@@ -27,7 +27,7 @@ func (t Toolchain) newRsync() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Rsync] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newRsync,

 		Name:        "rsync",
@@ -35,5 +35,5 @@ func init() {
 		Website:     "https://rsync.samba.org/",

 		ID: 4217,
-	}
+	})
 }
--- a/internal/rosa/squashfs.go
+++ b/internal/rosa/squashfs.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newSquashfsTools() (pkg.Artifact, string) {
+func (t Toolchain) newSquashfsTools(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "4.7.5"
 		checksum = "rF52wLQP-jeAmcD-48wqJcck8ZWRFwkax3T-7snaRf5EBnCQQh0YypMY9lwcivLz"
 	)
-	return t.NewPackage("squashfs-tools", version, newFromGitHubRelease(
+	return s.NewPackage(t, "squashfs-tools", version, newFromGitHubRelease(
 		"plougher/squashfs-tools",
 		version,
 		"squashfs-tools-"+version+".tar.gz",
@@ -42,7 +42,7 @@ func (t Toolchain) newSquashfsTools() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[SquashfsTools] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newSquashfsTools,

 		Name:        "squashfs-tools",
@@ -56,5 +56,5 @@ func init() {
 		},

 		ID: 4879,
-	}
+	})
 }
--- a/internal/rosa/stage0.go
+++ b/internal/rosa/stage0.go
@@ -5,57 +5,57 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newStage0() (pkg.Artifact, string) {
-	return t.New("rosa-stage0", 0, t.AppendPresets(nil,
+func (t Toolchain) newStage0(s *S) (pkg.Artifact, string) {
+	return s.New(t, "rosa-stage0", 0, s.AppendPresets(t, nil,
 		Bzip2,
 	), nil, nil, `
 umask 377
 tar \
 	-vjc \
 	-C /stage0 \
-	-f /work/stage0-`+triplet()+`.tar.bz2 \
+	-f /work/stage0-`+s.triple()+`.tar.bz2 \
 	.
-`, pkg.Path(fhs.AbsRoot.Append("stage0"), false, t.AppendPresets(nil,
+`, pkg.Path(fhs.AbsRoot.Append("stage0"), false, s.AppendPresets(t, nil,
 		LLVM,
 		Mksh,
 		toyboxEarly,
 	)...)), Unversioned
 }
 func init() {
-	artifactsM[Stage0] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newStage0,

 		Name:        "rosa-stage0",
 		Description: "Rosa OS stage0 toolchain tarball for bootstrap",
-	}
+	})
 }

 func init() {
 	const version = "20260504"
-	artifactsM[stage0Dist] = Metadata{
-		f: func(Toolchain) (pkg.Artifact, string) {
+	native.MustRegister(&Artifact{
+		f: func(_ Toolchain, s *S) (pkg.Artifact, string) {
 			return newTar(
 				"https://hakurei.app/seed/"+version+"/"+
-					"stage0-"+triplet()+".tar.bz2",
+					"stage0-"+s.triple()+".tar.bz2",
 				perArch[string]{
 					"amd64":   "IQjFDkiAVLo1XzflgMMiLP3gnVY2hhDMTzl-QqJDCQhcLQ3lLtRzjI5WCxGyW_lk",
 					"arm64":   "6fmwl2Umx2QssKQvxxb1JOGkAjzfA_MXKku0jVdGjYGb35OvwEVA5NYtd0HIy3yH",
 					"riscv64": "Z2ODV0rIoo9iQRUIu35bsaOBeXc_9qQfGcyb2aGneatzNUJlXh5emSpEV2bOklUL",
-				}.unwrap(),
+				}.unwrap(s),
 				pkg.TarBzip2,
 			), version
 		},

 		Name:        "stage0-dist",
 		Description: "Rosa OS stage0 bootstrap seed",
-	}
+	})
 }

 // HasStage0 returns whether a stage0 distribution is available.
 func HasStage0() (ok bool) {
 	func() {
 		defer func() { ok = recover() == nil }()
-		toolchainStage0.Load(stage0Dist)
+		native.Load(toolchainStage0, stage0Dist)
 	}()
 	return
 }
--- a/internal/rosa/state.go
+++ b/internal/rosa/state.go
@@ -0,0 +1,307 @@
+package rosa
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"runtime"
+	"slices"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"unique"
+
+	"hakurei.app/internal/pkg"
+)
+
+// ArtifactH is a handle of the unique name of a prepared [pkg.Artifact].
+type ArtifactH unique.Handle[string]
+
+// String returns the name of p.
+func (p ArtifactH) String() string {
+	return unique.Handle[string](p).Value()
+}
+
+// MarshalJSON represents [ArtifactH] by its [Artifact.Name].
+func (p ArtifactH) MarshalJSON() ([]byte, error) { return json.Marshal(p.String()) }
+
+// UnmarshalJSON resolves [ArtifactH] by its [Artifact.Name].
+func (p *ArtifactH) UnmarshalJSON(data []byte) error {
+	var name string
+	if err := json.Unmarshal(data, &name); err != nil {
+		return err
+	}
+	*p = ArtifactH(unique.Make(name))
+	return nil
+}
+
+// P represents multiple [ArtifactH].
+type P []ArtifactH
+
+// Artifact is stage-agnostic immutable data with a deterministic resulting
+// [pkg.Artifact]. It can be created natively or through evaluation.
+type Artifact struct {
+	f func(t Toolchain, s *S) (a pkg.Artifact, version string)
+
+	// Unique package name.
+	Name string `json:"name"`
+	// Short user-facing description.
+	Description string `json:"description"`
+	// Project home page.
+	Website string `json:"website,omitempty"`
+
+	// Runtime dependencies.
+	Dependencies P `json:"dependencies"`
+
+	// Project identifier on [Anitya].
+	//
+	// [Anitya]: https://release-monitoring.org/
+	ID int `json:"-"`
+
+	// Whether to exclude from exported functions.
+	Exclude bool `json:"exclude,omitempty"`
+
+	// Optional custom version checking behaviour.
+	latest func(v *Versions) string
+}
+
+// GetLatest returns the latest version described by v.
+func (meta *Artifact) GetLatest(v *Versions) string {
+	if meta.latest != nil {
+		return meta.latest(v)
+	}
+	return v.Latest
+}
+
+// Unversioned denotes an unversioned [Artifact].
+const Unversioned = "\x00"
+
+// UnpopulatedIDError is returned by [Artifact.GetLatest] for an instance of
+// [Artifact] where ID is not populated.
+type UnpopulatedIDError struct{}
+
+func (UnpopulatedIDError) Unwrap() error { return errors.ErrUnsupported }
+func (UnpopulatedIDError) Error() string { return "Anitya ID is not populated" }
+
+// Versions are package versions returned by Anitya.
+type Versions struct {
+	// The latest version for the project, as determined by the version sorting algorithm.
+	Latest string `json:"latest_version"`
+	// List of all versions that aren’t flagged as pre-release.
+	Stable []string `json:"stable_versions"`
+	// List of all versions stored, sorted from newest to oldest.
+	All []string `json:"versions"`
+}
+
+// getStable returns the first Stable version, or Latest if that is unavailable.
+func (v *Versions) getStable() string {
+	if len(v.Stable) == 0 {
+		return v.Latest
+	}
+	return v.Stable[0]
+}
+
+// GetVersions returns versions fetched from Anitya.
+func (meta *Artifact) GetVersions(ctx context.Context) (*Versions, error) {
+	if meta.ID == 0 {
+		return nil, UnpopulatedIDError{}
+	}
+
+	var resp *http.Response
+	if req, err := http.NewRequestWithContext(
+		ctx,
+		http.MethodGet,
+		"https://release-monitoring.org/api/v2/versions/?project_id="+
+			strconv.Itoa(meta.ID),
+		nil,
+	); err != nil {
+		return nil, err
+	} else {
+		req.Header.Set("User-Agent", "Rosa/1.1")
+		if resp, err = http.DefaultClient.Do(req); err != nil {
+			return nil, err
+		}
+	}
+
+	var v Versions
+	err := json.NewDecoder(resp.Body).Decode(&v)
+	return &v, errors.Join(err, resp.Body.Close())
+}
+
+// A cachedArtifact holds [pkg.Artifact] and its corresponding version string.
+type cachedArtifact struct {
+	a pkg.Artifact
+	v string
+}
+
+const (
+	// OptSkipCheck skips running all test suites.
+	OptSkipCheck = 1 << iota
+	// OptLLVMNoLTO disables LTO in all [LLVM] stages.
+	OptLLVMNoLTO
+)
+
+// S holds a set of [Artifact].
+type S struct {
+	// [ArtifactH] to [Artifact].
+	artifacts sync.Map
+	// Size of artifacts.
+	artifactCount atomic.Uint64
+
+	// Target architecture.
+	arch string
+	// For initialising arch.
+	archOnce sync.Once
+
+	// Options for [pkg.Artifact] created against [S].
+	opts int
+
+	// Cached [pkg.Artifact].
+	c [_toolchainEnd]sync.Map
+
+	// URL of a Gentoo stage3 tarball.
+	gentooStage3 string
+	// Expected checksum of gentooStage3.
+	gentooStage3Checksum pkg.Checksum
+}
+
+// Clone returns a copy of s.
+func (s *S) Clone() *S {
+	v := S{arch: s.arch}
+	s.artifacts.Range(func(key, value any) bool {
+		v.artifacts.Store(key, value)
+		v.artifactCount.Add(1)
+		return true
+	})
+	return &v
+}
+
+// wantsArch must be called before accessing arch.
+func (s *S) wantsArch() {
+	s.archOnce.Do(func() {
+		if s.arch == "" {
+			s.arch = runtime.GOARCH
+		}
+	})
+}
+
+// Arch returns the target architecture.
+func (s *S) Arch() string { s.wantsArch(); return s.arch }
+
+// Flags returns the current preset flags.
+func (s *S) Flags() int { return s.opts }
+
+// DropCaches arranges for all cached [pkg.Artifact] to be freed some time after
+// it returns. Must not be used concurrently with any other method.
+func (s *S) DropCaches(targetArch string, flags int) {
+	if targetArch == "" {
+		targetArch = runtime.GOARCH
+	}
+
+	s.arch = targetArch
+	s.opts = flags
+	for i := range s.c {
+		s.c[i].Clear()
+	}
+}
+
+// Get returns the address of the named [Artifact].
+func (s *S) Get(p ArtifactH) (meta *Artifact) {
+	s.wantsArch()
+	v, ok := s.artifacts.Load(p)
+	if ok {
+		meta = v.(*Artifact)
+	}
+	return
+}
+
+// MustGet is like Get, but panics if the named [Artifact] is not registered.
+func (s *S) MustGet(p ArtifactH) (meta *Artifact) {
+	meta = s.Get(p)
+	if meta == nil {
+		panic("artifact " + strconv.Quote(p.String()) + " not available")
+	}
+	return
+}
+
+// Load returns the resulting [pkg.Artifact] of [ArtifactH].
+func (s *S) Load(t Toolchain, p ArtifactH) (pkg.Artifact, string) {
+	s.wantsArch()
+	e, ok := s.c[t].Load(p)
+	if ok {
+		r := e.(cachedArtifact)
+		return r.a, r.v
+	}
+
+	meta := s.Get(p)
+	if meta == nil {
+		return nil, ""
+	}
+	var r cachedArtifact
+	r.a, r.v = meta.f(t, s)
+	s.c[t].Store(p, r)
+	return r.a, r.v
+}
+
+// MustLoad is like Load, but panics if the named [Artifact] is not registered.
+func (s *S) MustLoad(t Toolchain, p ArtifactH) (pkg.Artifact, string) {
+	a, version := s.Load(t, p)
+	if a == nil {
+		panic("artifact " + strconv.Quote(p.String()) + " not available")
+	}
+	return a, version
+}
+
+// Register arranges for a new [Artifact] to be cured under s. It returns false
+// if another [Artifact] is already registered under the same name.
+func (s *S) Register(meta *Artifact) bool {
+	if meta.Name == "" {
+		return false
+	}
+	p := ArtifactH(unique.Make(meta.Name))
+	_, ok := s.artifacts.LoadOrStore(p, meta)
+	if !ok {
+		s.artifactCount.Add(1)
+	}
+	return !ok
+}
+
+// MustRegister is like Register, but panics if registration fails.
+func (s *S) MustRegister(meta *Artifact) {
+	if !s.Register(meta) {
+		panic("attempting to register " + strconv.Quote(meta.Name) + " twice")
+	}
+}
+
+// Count returns the number of [Artifact] registered to s.
+func (s *S) Count() int {
+	return int(s.artifactCount.Load())
+}
+
+// Collect returns all [ArtifactH] registered to s.
+func (s *S) Collect() (handles []ArtifactH) {
+	handles = make([]ArtifactH, 0, s.Count())
+	s.artifacts.Range(func(key, _ any) bool {
+		handles = append(handles, key.(ArtifactH))
+		return true
+	})
+	slices.SortFunc(handles, func(a, b ArtifactH) int {
+		return strings.Compare(a.String(), b.String())
+	})
+	return
+}
+
+// SetGentooStage3 sets the Gentoo stage3 tarball url and checksum. It panics
+// if given zero values or if these values have already been set.
+func (s *S) SetGentooStage3(url string, checksum pkg.Checksum) {
+	if s.gentooStage3 != "" {
+		panic(errors.New("attempting to set Gentoo stage3 url twice"))
+	}
+	if url == "" {
+		panic(errors.New("attempting to set Gentoo stage3 url to the zero value"))
+	}
+	s.gentooStage3, s.gentooStage3Checksum = url, checksum
+	s.DropCaches(s.Arch(), s.Flags())
+}
--- a/internal/rosa/state_native.go
+++ b/internal/rosa/state_native.go
@@ -0,0 +1,197 @@
+package rosa
+
+import "unique"
+
+var (
+	LLVM                   = ArtifactH(unique.Make("llvm"))
+	EarlyInit              = ArtifactH(unique.Make("earlyinit"))
+	ImageSystem            = ArtifactH(unique.Make("system-image"))
+	ImageInitramfs         = ArtifactH(unique.Make("initramfs-image"))
+	Kernel                 = ArtifactH(unique.Make("kernel"))
+	KernelHeaders          = ArtifactH(unique.Make("kernel-headers"))
+	KernelSource           = ArtifactH(unique.Make("kernel-source"))
+	Firmware               = ArtifactH(unique.Make("firmware"))
+	ACL                    = ArtifactH(unique.Make("acl"))
+	ArgpStandalone         = ArtifactH(unique.Make("argp-standalone"))
+	Attr                   = ArtifactH(unique.Make("attr"))
+	Autoconf               = ArtifactH(unique.Make("autoconf"))
+	Automake               = ArtifactH(unique.Make("automake"))
+	BC                     = ArtifactH(unique.Make("bc"))
+	Bash                   = ArtifactH(unique.Make("bash"))
+	Binutils               = ArtifactH(unique.Make("binutils"))
+	Bison                  = ArtifactH(unique.Make("bison"))
+	Bzip2                  = ArtifactH(unique.Make("bzip2"))
+	CMake                  = ArtifactH(unique.Make("cmake"))
+	Connman                = ArtifactH(unique.Make("connman"))
+	Coreutils              = ArtifactH(unique.Make("coreutils"))
+	Curl                   = ArtifactH(unique.Make("curl"))
+	DBus                   = ArtifactH(unique.Make("dbus"))
+	DTC                    = ArtifactH(unique.Make("dtc"))
+	Diffutils              = ArtifactH(unique.Make("diffutils"))
+	Elfutils               = ArtifactH(unique.Make("elfutils"))
+	Fakeroot               = ArtifactH(unique.Make("fakeroot"))
+	Findutils              = ArtifactH(unique.Make("findutils"))
+	Flex                   = ArtifactH(unique.Make("flex"))
+	FontUtil               = ArtifactH(unique.Make("font-util"))
+	Freetype               = ArtifactH(unique.Make("freetype"))
+	Fuse                   = ArtifactH(unique.Make("fuse"))
+	GMP                    = ArtifactH(unique.Make("gmp"))
+	GLib                   = ArtifactH(unique.Make("glib"))
+	Gawk                   = ArtifactH(unique.Make("gawk"))
+	GenInitCPIO            = ArtifactH(unique.Make("gen_init_cpio"))
+	Gettext                = ArtifactH(unique.Make("gettext"))
+	Git                    = ArtifactH(unique.Make("git"))
+	Glslang                = ArtifactH(unique.Make("glslang"))
+	GnuTLS                 = ArtifactH(unique.Make("gnutls"))
+	Go                     = ArtifactH(unique.Make("go"))
+	Gperf                  = ArtifactH(unique.Make("gperf"))
+	Grep                   = ArtifactH(unique.Make("grep"))
+	Gzip                   = ArtifactH(unique.Make("gzip"))
+	Hakurei                = ArtifactH(unique.Make("hakurei"))
+	HakureiDist            = ArtifactH(unique.Make("hakurei-dist"))
+	Hwdata                 = ArtifactH(unique.Make("hwdata"))
+	IPTables               = ArtifactH(unique.Make("iptables"))
+	Kmod                   = ArtifactH(unique.Make("kmod"))
+	LIT                    = ArtifactH(unique.Make("lit"))
+	LibX11                 = ArtifactH(unique.Make("libX11"))
+	LibXau                 = ArtifactH(unique.Make("libXau"))
+	LibXdmcp               = ArtifactH(unique.Make("libXdmcp"))
+	LibXext                = ArtifactH(unique.Make("libXext"))
+	LibXfixes              = ArtifactH(unique.Make("libXfixes"))
+	LibXfont2              = ArtifactH(unique.Make("libXfont2"))
+	LibXrandr              = ArtifactH(unique.Make("libXrandr"))
+	LibXrender             = ArtifactH(unique.Make("libXrender"))
+	LibXxf86vm             = ArtifactH(unique.Make("libXxf86vm"))
+	Libarchive             = ArtifactH(unique.Make("libarchive"))
+	Libbsd                 = ArtifactH(unique.Make("libbsd"))
+	Libcap                 = ArtifactH(unique.Make("libcap"))
+	Libconfig              = ArtifactH(unique.Make("libconfig"))
+	LibdisplayInfo         = ArtifactH(unique.Make("libdisplay-info"))
+	Libdrm                 = ArtifactH(unique.Make("libdrm"))
+	Libepoxy               = ArtifactH(unique.Make("libepoxy"))
+	Libev                  = ArtifactH(unique.Make("libev"))
+	Libexpat               = ArtifactH(unique.Make("libexpat"))
+	Libffi                 = ArtifactH(unique.Make("libffi"))
+	Libfontenc             = ArtifactH(unique.Make("libfontenc"))
+	Libgd                  = ArtifactH(unique.Make("libgd"))
+	Libglvnd               = ArtifactH(unique.Make("libglvnd"))
+	Libiconv               = ArtifactH(unique.Make("libiconv"))
+	Libmd                  = ArtifactH(unique.Make("libmd"))
+	Libmnl                 = ArtifactH(unique.Make("libmnl"))
+	Libnftnl               = ArtifactH(unique.Make("libnftnl"))
+	Libpciaccess           = ArtifactH(unique.Make("libpciaccess"))
+	Libpng                 = ArtifactH(unique.Make("libpng"))
+	Libpsl                 = ArtifactH(unique.Make("libpsl"))
+	Libseccomp             = ArtifactH(unique.Make("libseccomp"))
+	Libtasn1               = ArtifactH(unique.Make("libtasn1"))
+	Libtirpc               = ArtifactH(unique.Make("libtirpc"))
+	Libtool                = ArtifactH(unique.Make("libtool"))
+	Libucontext            = ArtifactH(unique.Make("libucontext"))
+	Libunistring           = ArtifactH(unique.Make("libunistring"))
+	Libva                  = ArtifactH(unique.Make("libva"))
+	LibxcbRenderUtil       = ArtifactH(unique.Make("libxcb-render-util"))
+	LibxcbUtil             = ArtifactH(unique.Make("libxcb-util"))
+	LibxcbUtilImage        = ArtifactH(unique.Make("libxcb-util-image"))
+	LibxcbUtilKeysyms      = ArtifactH(unique.Make("libxcb-util-keysyms"))
+	LibxcbUtilWM           = ArtifactH(unique.Make("libxcb-util-wm"))
+	Libxcvt                = ArtifactH(unique.Make("libxcvt"))
+	Libxkbfile             = ArtifactH(unique.Make("libxkbfile"))
+	Libxml2                = ArtifactH(unique.Make("libxml2"))
+	Libxshmfence           = ArtifactH(unique.Make("libxshmfence"))
+	Libxslt                = ArtifactH(unique.Make("libxslt"))
+	Libxtrans              = ArtifactH(unique.Make("libxtrans"))
+	LMSensors              = ArtifactH(unique.Make("lm_sensors"))
+	M4                     = ArtifactH(unique.Make("m4"))
+	MPC                    = ArtifactH(unique.Make("mpc"))
+	MPFR                   = ArtifactH(unique.Make("mpfr"))
+	Make                   = ArtifactH(unique.Make("make"))
+	Mesa                   = ArtifactH(unique.Make("mesa"))
+	Meson                  = ArtifactH(unique.Make("meson"))
+	Mksh                   = ArtifactH(unique.Make("mksh"))
+	MuslFts                = ArtifactH(unique.Make("musl-fts"))
+	MuslObstack            = ArtifactH(unique.Make("musl-obstack"))
+	NSS                    = ArtifactH(unique.Make("nss"))
+	NSSCACert              = ArtifactH(unique.Make("nss-cacert"))
+	Ncurses                = ArtifactH(unique.Make("ncurses"))
+	Nettle                 = ArtifactH(unique.Make("nettle"))
+	Ninja                  = ArtifactH(unique.Make("ninja"))
+	OpenSSL                = ArtifactH(unique.Make("openssl"))
+	P11Kit                 = ArtifactH(unique.Make("p11-kit"))
+	PCRE2                  = ArtifactH(unique.Make("pcre2"))
+	Parallel               = ArtifactH(unique.Make("parallel"))
+	Patch                  = ArtifactH(unique.Make("patch"))
+	Perl                   = ArtifactH(unique.Make("perl"))
+	PerlLocaleGettext      = ArtifactH(unique.Make("perl-Locale::gettext"))
+	PerlMIMECharset        = ArtifactH(unique.Make("perl-MIME::Charset"))
+	PerlModuleBuild        = ArtifactH(unique.Make("perl-Module::Build"))
+	PerlPodParser          = ArtifactH(unique.Make("perl-Pod::Parser"))
+	PerlSGMLS              = ArtifactH(unique.Make("perl-SGMLS"))
+	PerlTermReadKey        = ArtifactH(unique.Make("perl-Term::ReadKey"))
+	PerlTestCmd            = ArtifactH(unique.Make("perl-Test::Cmd"))
+	PerlTextCharWidth      = ArtifactH(unique.Make("perl-Text::CharWidth"))
+	PerlTextWrapI18N       = ArtifactH(unique.Make("perl-Text::WrapI18N"))
+	PerlUnicodeLineBreak   = ArtifactH(unique.Make("perl-Unicode::LineBreak"))
+	PerlYAMLTiny           = ArtifactH(unique.Make("perl-YAML::Tiny"))
+	Pixman                 = ArtifactH(unique.Make("pixman"))
+	PkgConfig              = ArtifactH(unique.Make("pkg-config"))
+	Procps                 = ArtifactH(unique.Make("procps"))
+	Python                 = ArtifactH(unique.Make("python"))
+	PythonFlitCore         = ArtifactH(unique.Make("python-flit-core"))
+	PythonHatchling        = ArtifactH(unique.Make("python-hatchling"))
+	PythonIniConfig        = ArtifactH(unique.Make("python-iniconfig"))
+	PythonMako             = ArtifactH(unique.Make("python-mako"))
+	PythonMarkupSafe       = ArtifactH(unique.Make("python-markupsafe"))
+	PythonPackaging        = ArtifactH(unique.Make("python-packaging"))
+	PythonPathspec         = ArtifactH(unique.Make("python-pathspec"))
+	PythonPluggy           = ArtifactH(unique.Make("python-pluggy"))
+	PythonPyTest           = ArtifactH(unique.Make("python-pytest"))
+	PythonPyYAML           = ArtifactH(unique.Make("python-pyyaml"))
+	PythonPycparser        = ArtifactH(unique.Make("python-pycparser"))
+	PythonPygments         = ArtifactH(unique.Make("python-pygments"))
+	PythonSetuptools       = ArtifactH(unique.Make("python-setuptools"))
+	PythonSetuptoolsSCM    = ArtifactH(unique.Make("python-setuptools-scm"))
+	PythonTroveClassifiers = ArtifactH(unique.Make("python-trove-classifiers"))
+	PythonVCSVersioning    = ArtifactH(unique.Make("python-vcs-versioning"))
+	PythonWheel            = ArtifactH(unique.Make("python-wheel"))
+	QEMU                   = ArtifactH(unique.Make("qemu"))
+	Rdfind                 = ArtifactH(unique.Make("rdfind"))
+	Readline               = ArtifactH(unique.Make("readline"))
+	Rsync                  = ArtifactH(unique.Make("rsync"))
+	Sed                    = ArtifactH(unique.Make("sed"))
+	SPIRVHeaders           = ArtifactH(unique.Make("spirv-headers"))
+	SPIRVLLVMTranslator    = ArtifactH(unique.Make("spirv-llvm-translator"))
+	SPIRVTools             = ArtifactH(unique.Make("spirv-tools"))
+	SquashfsTools          = ArtifactH(unique.Make("squashfs-tools"))
+	Strace                 = ArtifactH(unique.Make("strace"))
+	TamaGo                 = ArtifactH(unique.Make("tamago"))
+	Tar                    = ArtifactH(unique.Make("tar"))
+	Texinfo                = ArtifactH(unique.Make("texinfo"))
+	Toybox                 = ArtifactH(unique.Make("toybox"))
+	toyboxEarly            = ArtifactH(unique.Make("toybox-early"))
+	Unzip                  = ArtifactH(unique.Make("unzip"))
+	UtilLinux              = ArtifactH(unique.Make("util-linux"))
+	VIM                    = ArtifactH(unique.Make("vim"))
+	Wayland                = ArtifactH(unique.Make("wayland"))
+	WaylandProtocols       = ArtifactH(unique.Make("wayland-protocols"))
+	XCB                    = ArtifactH(unique.Make("xcb"))
+	XCBProto               = ArtifactH(unique.Make("xcb-proto"))
+	XDGDBusProxy           = ArtifactH(unique.Make("xdg-dbus-proxy"))
+	XZ                     = ArtifactH(unique.Make("xz"))
+	Xkbcomp                = ArtifactH(unique.Make("xkbcomp"))
+	XkeyboardConfig        = ArtifactH(unique.Make("xkeyboard-config"))
+	XorgProto              = ArtifactH(unique.Make("xorgproto"))
+	Xserver                = ArtifactH(unique.Make("xserver"))
+	Zlib                   = ArtifactH(unique.Make("zlib"))
+	Zstd                   = ArtifactH(unique.Make("zstd"))
+	stage0Dist             = ArtifactH(unique.Make("stage0-dist"))
+	llvmSource             = ArtifactH(unique.Make("llvm-project"))
+	earlyCompilerRT        = ArtifactH(unique.Make("early-compiler-rt"))
+	earlyRuntimes          = ArtifactH(unique.Make("early-runtimes"))
+	buildcatrust           = ArtifactH(unique.Make("python-buildcatrust"))
+	utilMacros             = ArtifactH(unique.Make("util-macros"))
+	Musl                   = ArtifactH(unique.Make("musl"))
+	muslHeaders            = ArtifactH(unique.Make("musl-headers"))
+	gcc                    = ArtifactH(unique.Make("gcc"))
+	nettle3                = ArtifactH(unique.Make("nettle3"))
+	Stage0                 = ArtifactH(unique.Make("rosa-stage0"))
+)
--- a/internal/rosa/state_test.go
+++ b/internal/rosa/state_test.go
@@ -0,0 +1,33 @@
+package rosa_test
+
+import (
+	"testing"
+
+	"hakurei.app/internal/rosa"
+)
+
+func TestLoad(t *testing.T) {
+	t.Parallel()
+
+	for _, p := range rosa.Native().Collect() {
+		t.Run(rosa.Native().MustGet(p).Name, func(t *testing.T) {
+			t.Parallel()
+
+			rosa.Native().Load(rosa.Std, p)
+		})
+	}
+}
+
+func BenchmarkAll(b *testing.B) {
+	s := rosa.Native().Clone()
+
+	for b.Loop() {
+		for _, p := range s.Collect() {
+			s.Load(rosa.Std, p)
+		}
+
+		b.StopTimer()
+		s.DropCaches("", 0)
+		b.StartTimer()
+	}
+}
--- a/internal/rosa/strace.go
+++ b/internal/rosa/strace.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newStrace() (pkg.Artifact, string) {
+func (t Toolchain) newStrace(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "6.19"
 		checksum = "XJFJJ9XLh_1rHS3m_QNjLKzkkBAooE-QT9p9lJNNWowAmd54IJop_fI4-IFtjeeL"
 	)
-	return t.NewPackage("strace", version, pkg.NewHTTPGet(
+	return s.NewPackage(t, "strace", version, pkg.NewHTTPGet(
 		nil, "https://strace.io/files/"+version+"/strace-"+version+".tar.xz",
 		mustDecode(checksum),
 	), &PackageAttr{
@@ -37,7 +37,7 @@ sed -i 's/unsigned int msg_len;$/uint32_t msg_len;/g' \
 	), version
 }
 func init() {
-	artifactsM[Strace] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newStrace,

 		Name:        "strace",
@@ -45,5 +45,5 @@ func init() {
 		Website:     "https://strace.io/",

 		ID: 4897,
-	}
+	})
 }
--- a/internal/rosa/tamago.go
+++ b/internal/rosa/tamago.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newTamaGo() (pkg.Artifact, string) {
+func (t Toolchain) newTamaGo(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.26.3"
 		checksum = "-nH3MjAzDDLTeJ2hRKYJcJwo5-Ikci4zOHfB8j1vKn7zrF9TS6zYaoLi8qohGwAE"
 	)
-	return t.New("tamago-go"+version, 0, t.AppendPresets(nil,
+	return s.New(t, "tamago-go"+version, 0, s.AppendPresets(t, nil,
 		Bash,
 		Go,
 	), nil, []string{
@@ -21,8 +21,8 @@ cd /work/system/tamago/src
 chmod -R +w ..

 sed -i \
-	's,/lib/ld-musl-`+linuxArch()+`.so.1,/system/bin/linker,' \
-	cmd/link/internal/`+arch+`/obj.go
+	's,/lib/ld-musl-`+s.linuxArch()+`.so.1,/system/bin/linker,' \
+	cmd/link/internal/`+s.arch+`/obj.go
 sed -i \
 	's/cpu.X86.HasAVX512VBMI/& \&\& cpu.X86.HasPOPCNT/' \
 	internal/runtime/gc/scan/scan_amd64.go
@@ -40,7 +40,7 @@ rm \
 	))), version
 }
 func init() {
-	artifactsM[TamaGo] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newTamaGo,

 		Name:        "tamago",
@@ -48,5 +48,5 @@ func init() {
 		Website:     "https://github.com/usbarmory/tamago-go",

 		ID: 388872,
-	}
+	})
 }
--- a/internal/rosa/toybox.go
+++ b/internal/rosa/toybox.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newToybox(suffix, script string) (pkg.Artifact, string) {
+func (s *S) newToybox(t Toolchain, suffix, script string) (pkg.Artifact, string) {
 	const (
 		version  = "0.8.13"
 		checksum = "rZ1V1ATDte2WeQZanxLVoiRGdfPXhMlEo5-exX-e-ml8cGn9qOv0ABEUVZpX3wTI"
 	)
-	return t.NewPackage("toybox"+suffix, version, newTar(
+	return s.NewPackage(t, "toybox"+suffix, version, newTar(
 		"https://landley.net/toybox/downloads/toybox-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -59,9 +59,9 @@ ln -s ../../system/bin/env /work/usr/bin
 	), version
 }
 func init() {
-	artifactsM[Toybox] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newToybox("", "")
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.newToybox(t, "", "")
 		},

 		Name:        "toybox",
@@ -69,11 +69,11 @@ func init() {
 		Website:     "https://landley.net/toybox/",

 		ID: 13818,
-	}
+	})

-	artifactsM[toyboxEarly] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newToybox("-early", `
+	native.MustRegister(&Artifact{
+		f: func(t Toolchain, s *S) (pkg.Artifact, string) {
+			return s.newToybox(t, "-early", `
 echo '
 CONFIG_EXPR=y
 CONFIG_TR=y
@@ -86,5 +86,5 @@ CONFIG_DIFF=y
 		Name:        "toybox-early",
 		Description: "a build of toybox with unfinished tools enabled to break dependency loops",
 		Website:     "https://landley.net/toybox/",
-	}
+	})
 }
--- a/internal/rosa/unzip.go
+++ b/internal/rosa/unzip.go
@@ -6,12 +6,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newUnzip() (pkg.Artifact, string) {
+func (t Toolchain) newUnzip(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "6.0"
 		checksum = "fcqjB1IOVRNJ16K5gTGEDt3zCJDVBc7EDSra9w3H93stqkNwH1vaPQs_QGOpQZu1"
 	)
-	return t.New("unzip-"+version, 0, t.AppendPresets(nil,
+	return s.New(t, "unzip-"+version, 0, s.AppendPresets(t, nil,
 		Make,
 		Coreutils,
 	), nil, nil, `
@@ -21,7 +21,7 @@ make -f unix/Makefile generic1

 mkdir -p /work/system/bin/
 mv unzip /work/system/bin/
-`, pkg.Path(AbsUsrSrc.Append("unzip"), true, t.NewPatchedSource(
+`, pkg.Path(AbsUsrSrc.Append("unzip"), true, s.NewPatchedSource(t,
 		"unzip", version, newTar(
 			"https://downloads.sourceforge.net/project/infozip/"+
 				"UnZip%206.x%20%28latest%29/UnZip%20"+version+"/"+
@@ -32,7 +32,7 @@ mv unzip /work/system/bin/
 	))), version
 }
 func init() {
-	artifactsM[Unzip] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newUnzip,

 		Name:        "unzip",
@@ -40,5 +40,5 @@ func init() {
 		Website:     "https://infozip.sourceforge.net/",

 		ID: 8684,
-	}
+	})
 }
--- a/internal/rosa/util-linux.go
+++ b/internal/rosa/util-linux.go
@@ -6,12 +6,12 @@ import (
 	"hakurei.app/internal/pkg"
 )

-func (t Toolchain) newUtilLinux() (pkg.Artifact, string) {
+func (t Toolchain) newUtilLinux(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.42"
 		checksum = "Uy8Nxg9DsW5YwDoeaZeZTyQJ2YmnaaL_fSsQXsLUiFFUd7wnZeD_3SEaVO7ClJlk"
 	)
-	return t.NewPackage("util-linux", version, newTar(
+	return s.NewPackage(t, "util-linux", version, newTar(
 		"https://www.kernel.org/pub/linux/utils/util-linux/"+
 			"v"+strings.Join(strings.SplitN(version, ".", 3)[:2], ".")+
 			"/util-linux-"+version+".tar.gz",
@@ -47,7 +47,7 @@ ln -s ../system/bin/bash /bin/
 	), version
 }
 func init() {
-	artifactsM[UtilLinux] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newUtilLinux,

 		Name:        "util-linux",
@@ -58,5 +58,5 @@ func init() {

 		// release candidates confuse Anitya
 		latest: (*Versions).getStable,
-	}
+	})
 }
--- a/internal/rosa/vim.go
+++ b/internal/rosa/vim.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newVIM() (pkg.Artifact, string) {
+func (t Toolchain) newVIM(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "9.2.0461"
 		checksum = "18Rr_5oIf_PkKuqVkN4CMZIGkZEgpN1vamlrsvPLBjn4mN98CRuoJmhzRZ7MoVYM"
 	)
-	return t.NewPackage("vim", version, newFromGitHub(
+	return s.NewPackage(t, "vim", version, newFromGitHub(
 		"vim/vim",
 		"v"+version,
 		checksum,
@@ -29,7 +29,7 @@ func (t Toolchain) newVIM() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[VIM] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newVIM,

 		Name:        "vim",
@@ -41,5 +41,5 @@ func init() {
 		},

 		ID: 5092,
-	}
+	})
 }
--- a/internal/rosa/wayland.go
+++ b/internal/rosa/wayland.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newWayland() (pkg.Artifact, string) {
+func (t Toolchain) newWayland(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.25.0"
 		checksum = "q-4dYXme46JPgLGtXAxyZGTy7udll9RfT0VXtcW2YRR1WWViUhvdZXZneXzLqpCg"
 	)
-	return t.NewPackage("wayland", version, newFromGitLab(
+	return s.NewPackage(t, "wayland", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"wayland/wayland",
 		version,
@@ -35,7 +35,7 @@ echo 'int main(){}' > tests/sanity-test.c
 	), version
 }
 func init() {
-	artifactsM[Wayland] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newWayland,

 		Name:        "wayland",
@@ -49,15 +49,15 @@ func init() {
 		},

 		ID: 10061,
-	}
+	})
 }

-func (t Toolchain) newWaylandProtocols() (pkg.Artifact, string) {
+func (t Toolchain) newWaylandProtocols(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.48"
 		checksum = "xvfHCBIzXGwOqOu9b8dfhGw_U29Pd-g4JBwpYIaxee8SwEbxi6NaVU-Y1Q7wY4jK"
 	)
-	return t.NewPackage("wayland-protocols", version, newFromGitLab(
+	return s.NewPackage(t, "wayland-protocols", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"wayland/wayland-protocols",
 		version,
@@ -121,7 +121,7 @@ GitLab
 	), version
 }
 func init() {
-	artifactsM[WaylandProtocols] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newWaylandProtocols,

 		Name:        "wayland-protocols",
@@ -129,5 +129,5 @@ func init() {
 		Website:     "https://wayland.freedesktop.org/",

 		ID: 13997,
-	}
+	})
 }
--- a/internal/rosa/x.go
+++ b/internal/rosa/x.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newUtilMacros() (pkg.Artifact, string) {
+func (t Toolchain) newUtilMacros(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.20.2"
 		checksum = "Ze8QH3Z3emC0pWFP-0nUYeMy7aBW3L_dxBBmVgcumIHNzEKc1iGTR-yUFR3JcM1G"
 	)
-	return t.NewPackage("util-macros", version, newTar(
+	return s.NewPackage(t, "util-macros", version, newTar(
 		"https://www.x.org/releases/individual/util/"+
 			"util-macros-"+version+".tar.gz",
 		checksum,
@@ -15,7 +15,7 @@ func (t Toolchain) newUtilMacros() (pkg.Artifact, string) {
 	), nil, (*MakeHelper)(nil)), version
 }
 func init() {
-	artifactsM[utilMacros] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newUtilMacros,

 		Name:        "util-macros",
@@ -23,15 +23,15 @@ func init() {
 		Website:     "https://xorg.freedesktop.org/",

 		ID: 5252,
-	}
+	})
 }

-func (t Toolchain) newLibxtrans() (pkg.Artifact, string) {
+func (t Toolchain) newLibxtrans(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.6.0"
 		checksum = "1cxDCF59fLf1HyGDMcjR1L50ZbjD0RTTEDUpOJYcHXu6HUK_Ds0x-KREY7rLNxu9"
 	)
-	return t.NewPackage("libxtrans", version, newFromGitLab(
+	return s.NewPackage(t, "libxtrans", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxtrans",
 		"xtrans-"+version,
@@ -47,7 +47,7 @@ func (t Toolchain) newLibxtrans() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libxtrans] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxtrans,

 		Name:        "libxtrans",
@@ -55,15 +55,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/lib/libxtrans",

 		ID: 13441,
-	}
+	})
 }

-func (t Toolchain) newXorgProto() (pkg.Artifact, string) {
+func (t Toolchain) newXorgProto(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2025.1"
 		checksum = "pTwJiBJHKA6Rgm3cVDXy1lyvXNIUzTRaukvvYdk1xWoJ_1G-Dfjm9MyewuyIjoHz"
 	)
-	return t.NewPackage("xorgproto", version, newFromGitLab(
+	return s.NewPackage(t, "xorgproto", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/proto/xorgproto",
 		"xorgproto-"+version,
@@ -78,7 +78,7 @@ func (t Toolchain) newXorgProto() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[XorgProto] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXorgProto,

 		Name:        "xorgproto",
@@ -86,15 +86,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/proto/xorgproto",

 		ID: 17190,
-	}
+	})
 }

-func (t Toolchain) newLibXau() (pkg.Artifact, string) {
+func (t Toolchain) newLibXau(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.0.12"
 		checksum = "G9AjnU_C160q814MCdjFOVt_mQz_pIt4wf4GNOQmGJS3UuuyMw53sfPvJ7WOqwXN"
 	)
-	return t.NewPackage("libXau", version, newTar(
+	return s.NewPackage(t, "libXau", version, newTar(
 		"https://www.x.org/releases/individual/lib/"+
 			"libXau-"+version+".tar.gz",
 		checksum,
@@ -112,7 +112,7 @@ func (t Toolchain) newLibXau() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXau] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXau,

 		Name:        "libXau",
@@ -124,15 +124,15 @@ func init() {
 		},

 		ID: 1765,
-	}
+	})
 }

-func (t Toolchain) newXCBProto() (pkg.Artifact, string) {
+func (t Toolchain) newXCBProto(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.17.0"
 		checksum = "_NtbKaJ_iyT7XiJz25mXQ7y-niTzE8sHPvLXZPcqtNoV_-vTzqkezJ8Hp2U1enCv"
 	)
-	return t.NewPackage("xcb-proto", version, newTar(
+	return s.NewPackage(t, "xcb-proto", version, newTar(
 		"https://xcb.freedesktop.org/dist/xcb-proto-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -141,7 +141,7 @@ func (t Toolchain) newXCBProto() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[XCBProto] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXCBProto,

 		Name:        "xcb-proto",
@@ -149,15 +149,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/proto/xcbproto",

 		ID: 13646,
-	}
+	})
 }

-func (t Toolchain) newXCB() (pkg.Artifact, string) {
+func (t Toolchain) newXCB(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.17.0"
 		checksum = "hjjsc79LpWM_hZjNWbDDS6qRQUXREjjekS6UbUsDq-RR1_AjgNDxhRvZf-1_kzDd"
 	)
-	return t.NewPackage("xcb", version, newTar(
+	return s.NewPackage(t, "xcb", version, newTar(
 		"https://xcb.freedesktop.org/dist/libxcb-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -170,7 +170,7 @@ func (t Toolchain) newXCB() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[XCB] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXCB,

 		Name:        "xcb",
@@ -183,15 +183,15 @@ func init() {
 		},

 		ID: 1767,
-	}
+	})
 }

-func (t Toolchain) newLibxcbUtilKeysyms() (pkg.Artifact, string) {
+func (t Toolchain) newLibxcbUtilKeysyms(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.4.1"
 		checksum = "-EEje12UEjtFBuIjb6Fy4cxEghV20BXwQ1BLvhtvSuVcrFkp_X-ZHRM48wAspXZ4"
 	)
-	return t.NewPackage("libxcb-util-keysyms", version, newTar(
+	return s.NewPackage(t, "libxcb-util-keysyms", version, newTar(
 		"https://xcb.freedesktop.org/dist/xcb-util-keysyms-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -202,7 +202,7 @@ func (t Toolchain) newLibxcbUtilKeysyms() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibxcbUtilKeysyms] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxcbUtilKeysyms,

 		Name:        "libxcb-util-keysyms",
@@ -214,15 +214,15 @@ func init() {
 		},

 		ID: 5168,
-	}
+	})
 }

-func (t Toolchain) newLibxcbUtilImage() (pkg.Artifact, string) {
+func (t Toolchain) newLibxcbUtilImage(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.4.1"
 		checksum = "47pvXmFwaUBZIrJ4CE9xjTQIFyxeqoNAL-DshlB11GZ_jjI3G1a6KF0K7mtBQ1E7"
 	)
-	return t.NewPackage("libxcb-util-image", version, newTar(
+	return s.NewPackage(t, "libxcb-util-image", version, newTar(
 		"https://xcb.freedesktop.org/dist/xcb-util-image-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -233,7 +233,7 @@ func (t Toolchain) newLibxcbUtilImage() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibxcbUtilImage] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxcbUtilImage,

 		Name:        "libxcb-util-image",
@@ -245,15 +245,15 @@ func init() {
 		},

 		ID: 5168,
-	}
+	})
 }

-func (t Toolchain) newLibxcbUtilWM() (pkg.Artifact, string) {
+func (t Toolchain) newLibxcbUtilWM(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.4.2"
 		checksum = "g0VZgMU9hcIgyXb3XxBR9xqsvUMBd9qt_Dbmwoj2h5y24pODr_S_D0DhRsuXUNjF"
 	)
-	return t.NewPackage("libxcb-util-wm", version, newTar(
+	return s.NewPackage(t, "libxcb-util-wm", version, newTar(
 		"https://xcb.freedesktop.org/dist/xcb-util-wm-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -265,7 +265,7 @@ func (t Toolchain) newLibxcbUtilWM() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibxcbUtilWM] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxcbUtilWM,

 		Name:        "libxcb-util-wm",
@@ -277,15 +277,15 @@ func init() {
 		},

 		ID: 5170,
-	}
+	})
 }

-func (t Toolchain) newLibxcbUtil() (pkg.Artifact, string) {
+func (t Toolchain) newLibxcbUtil(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.4.1"
 		checksum = "YMXGQUQbF6PoEAGflvYnJYsLWjti6sL_ifY47wIXTNGVM3tQ8u41nkBYN4K1D5CD"
 	)
-	return t.NewPackage("libxcb-util", version, newTar(
+	return s.NewPackage(t, "libxcb-util", version, newTar(
 		"https://www.x.org/releases/individual/xcb/"+
 			"xcb-util-"+version+".tar.gz",
 		checksum,
@@ -298,7 +298,7 @@ func (t Toolchain) newLibxcbUtil() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibxcbUtil] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxcbUtil,

 		Name:        "libxcb-util",
@@ -310,15 +310,15 @@ func init() {
 		},

 		ID: 5165,
-	}
+	})
 }

-func (t Toolchain) newLibxcbRenderUtil() (pkg.Artifact, string) {
+func (t Toolchain) newLibxcbRenderUtil(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.3.10"
 		checksum = "n08L8PyCoOd7v2vb6fSVq5Pq6JtteXVh9K2wrQMTNwGMf_Fjpi6i3HWF-TMFSVTI"
 	)
-	return t.NewPackage("libxcb-render-util", version, newTar(
+	return s.NewPackage(t, "libxcb-render-util", version, newTar(
 		"https://www.x.org/releases/individual/xcb/"+
 			"xcb-util-renderutil-"+version+".tar.gz",
 		checksum,
@@ -331,7 +331,7 @@ func (t Toolchain) newLibxcbRenderUtil() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibxcbRenderUtil] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxcbRenderUtil,

 		Name:        "libxcb-render-util",
@@ -343,15 +343,15 @@ func init() {
 		},

 		ID: 5169,
-	}
+	})
 }

-func (t Toolchain) newLibX11() (pkg.Artifact, string) {
+func (t Toolchain) newLibX11(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.8.13"
 		checksum = "ARh-cuZY_U2v3DbPS1byc7ybh9NInZc-yav7SJiusk_C7408s058qWV83ocMd2pT"
 	)
-	return t.NewPackage("libX11", version, newFromGitLab(
+	return s.NewPackage(t, "libX11", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libx11",
 		"libX11-"+version,
@@ -375,7 +375,7 @@ func (t Toolchain) newLibX11() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibX11] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibX11,

 		Name:        "libX11",
@@ -387,15 +387,15 @@ func init() {
 		},

 		ID: 1764,
-	}
+	})
 }

-func (t Toolchain) newLibXext() (pkg.Artifact, string) {
+func (t Toolchain) newLibXext(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.3.7"
 		checksum = "-0wvUDaucLPLNOrK1pcKhHNoO-5nUqQyyw6JAbhx65gRjuMiNKKaF2_tcrbC_KNq"
 	)
-	return t.NewPackage("libXext", version, newFromGitLab(
+	return s.NewPackage(t, "libXext", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxext",
 		"libXext-"+version,
@@ -412,7 +412,7 @@ func (t Toolchain) newLibXext() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXext] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXext,

 		Name:        "libXext",
@@ -424,15 +424,15 @@ func init() {
 		},

 		ID: 1774,
-	}
+	})
 }

-func (t Toolchain) newLibXfixes() (pkg.Artifact, string) {
+func (t Toolchain) newLibXfixes(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "6.0.2"
 		checksum = "_-kJfKZ7cE3NNeMr6NLSXCmsyP7MVEHVPLNfxatz2qBy3_fZJvPMQwZNOC9y6V5L"
 	)
-	return t.NewPackage("libXfixes", version, newFromGitLab(
+	return s.NewPackage(t, "libXfixes", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxfixes",
 		"libXfixes-"+version,
@@ -450,7 +450,7 @@ func (t Toolchain) newLibXfixes() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXfixes] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXfixes,

 		Name:        "libXfixes",
@@ -462,15 +462,15 @@ func init() {
 		},

 		ID: 1775,
-	}
+	})
 }

-func (t Toolchain) newLibXrender() (pkg.Artifact, string) {
+func (t Toolchain) newLibXrender(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.9.12"
 		checksum = "s6nWn-r17X_W-7anaS7wIcq5_Levf9zAigwJDD9Klp-cCJTVDhLo7GufuVOrxVP0"
 	)
-	return t.NewPackage("libXrender", version, newFromGitLab(
+	return s.NewPackage(t, "libXrender", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxrender",
 		"libXrender-"+version,
@@ -487,7 +487,7 @@ func (t Toolchain) newLibXrender() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXrender] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXrender,

 		Name:        "libXrender",
@@ -499,15 +499,15 @@ func init() {
 		},

 		ID: 1789,
-	}
+	})
 }

-func (t Toolchain) newLibxshmfence() (pkg.Artifact, string) {
+func (t Toolchain) newLibxshmfence(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.3.3"
 		checksum = "JamExTPg81By2fs3vWdeo_dzlpBQeAwXr2sDXeHJqm9XBoLW5pamiD6FgAWtAKyA"
 	)
-	return t.NewPackage("libxshmfence", version, newFromGitLab(
+	return s.NewPackage(t, "libxshmfence", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxshmfence",
 		"libxshmfence-"+version,
@@ -524,7 +524,7 @@ func (t Toolchain) newLibxshmfence() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libxshmfence] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxshmfence,

 		Name:        "libxshmfence",
@@ -532,15 +532,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/lib/libxshmfence",

 		ID: 1792,
-	}
+	})
 }

-func (t Toolchain) newLibXxf86vm() (pkg.Artifact, string) {
+func (t Toolchain) newLibXxf86vm(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.1.7"
 		checksum = "mS4cgKWrwz6M1Lb6Qu4ZVh8Xn2Ca_4HXPxr3LDad4iYY1LecZfeLUPW1hkp6amX_"
 	)
-	return t.NewPackage("libXxf86vm", version, newFromGitLab(
+	return s.NewPackage(t, "libXxf86vm", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxxf86vm",
 		"libXxf86vm-"+version,
@@ -558,7 +558,7 @@ func (t Toolchain) newLibXxf86vm() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXxf86vm] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXxf86vm,

 		Name:        "libXxf86vm",
@@ -570,15 +570,15 @@ func init() {
 		},

 		ID: 1799,
-	}
+	})
 }

-func (t Toolchain) newLibXrandr() (pkg.Artifact, string) {
+func (t Toolchain) newLibXrandr(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.5.5"
 		checksum = "OF7C7VC5MwnFue9UX5UnIkG1PIWvn9bBMq6d4mVyJJ_rcF0w4Kedn1lfxBsXEKAP"
 	)
-	return t.NewPackage("libXrandr", version, newFromGitLab(
+	return s.NewPackage(t, "libXrandr", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxrandr",
 		"libXrandr-"+version,
@@ -597,7 +597,7 @@ func (t Toolchain) newLibXrandr() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXrandr] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXrandr,

 		Name:        "libXrandr",
@@ -610,15 +610,15 @@ func init() {
 		},

 		ID: 1788,
-	}
+	})
 }

-func (t Toolchain) newFontUtil() (pkg.Artifact, string) {
+func (t Toolchain) newFontUtil(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.4.2"
 		checksum = "YWiaIxkq-N2yNdbGa_RF1S0UkQq6xsgoRT73WZP2DOmyH_CJ0TAkpQjId657MQmh"
 	)
-	return t.NewPackage("font-util", version, newFromGitLab(
+	return s.NewPackage(t, "font-util", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/font/util",
 		"font-util-"+version,
@@ -634,7 +634,7 @@ func (t Toolchain) newFontUtil() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[FontUtil] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newFontUtil,

 		Name:        "font-util",
@@ -642,15 +642,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/font/util",

 		ID: 15055,
-	}
+	})
 }

-func (t Toolchain) newLibfontenc() (pkg.Artifact, string) {
+func (t Toolchain) newLibfontenc(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.1.9"
 		checksum = "XqosXfbVwaoYzG9vVyRCl3eatwjASoJdLZsxQ37NN8S_jTyqNmbxpRSJGImJj7RS"
 	)
-	return t.NewPackage("libfontenc", version, newFromGitLab(
+	return s.NewPackage(t, "libfontenc", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libfontenc",
 		"libfontenc-"+version,
@@ -668,7 +668,7 @@ func (t Toolchain) newLibfontenc() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libfontenc] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibfontenc,

 		Name:        "libfontenc",
@@ -676,15 +676,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/lib/libfontenc",

 		ID: 1613,
-	}
+	})
 }

-func (t Toolchain) newLibxkbfile() (pkg.Artifact, string) {
+func (t Toolchain) newLibxkbfile(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.2.0"
 		checksum = "WUtph1ab0AyATahlwljchBxZJcpjYrjyhCK9DW2VO0uXEXaN22GWmUaibcA83i_B"
 	)
-	return t.NewPackage("libxkbfile", version, newFromGitLab(
+	return s.NewPackage(t, "libxkbfile", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxkbfile",
 		"libxkbfile-"+version,
@@ -694,7 +694,7 @@ func (t Toolchain) newLibxkbfile() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Libxkbfile] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxkbfile,

 		Name:        "libxkbfile",
@@ -706,15 +706,15 @@ func init() {
 		},

 		ID: 1781,
-	}
+	})
 }

-func (t Toolchain) newXkbcomp() (pkg.Artifact, string) {
+func (t Toolchain) newXkbcomp(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.5.0"
 		checksum = "ttICW8ZPbljI-nw2kknvxFhwFoDK40iAMBeZDLAHYsHf3B6UPO_zc9TpzZYRRyZH"
 	)
-	return t.NewPackage("xkbcomp", version, newFromGitLab(
+	return s.NewPackage(t, "xkbcomp", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/app/xkbcomp",
 		"xkbcomp-"+version,
@@ -732,7 +732,7 @@ func (t Toolchain) newXkbcomp() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Xkbcomp] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXkbcomp,

 		Name:        "xkbcomp",
@@ -744,15 +744,15 @@ func init() {
 		},

 		ID: 15018,
-	}
+	})
 }

-func (t Toolchain) newLibXfont2() (pkg.Artifact, string) {
+func (t Toolchain) newLibXfont2(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.0.7"
 		checksum = "jv9BZNA02493KB8j1lfAErF5SA3ZFcAhm3_UVJ--Bp1maz-vNprl_wXpkHApBi9M"
 	)
-	return t.NewPackage("libXfont2", version, newFromGitLab(
+	return s.NewPackage(t, "libXfont2", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxfont",
 		"libXfont2-"+version,
@@ -772,7 +772,7 @@ func (t Toolchain) newLibXfont2() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXfont2] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXfont2,

 		Name:        "libXfont2",
@@ -785,15 +785,15 @@ func init() {
 		},

 		ID: 17165,
-	}
+	})
 }

-func (t Toolchain) newLibxcvt() (pkg.Artifact, string) {
+func (t Toolchain) newLibxcvt(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.1.3"
 		checksum = "IfIA7SxlHMWh681e1AgYmZcRAfkZd5LlzmqcMRifNY5nNVRrUx_wnoaidAv0Yu03"
 	)
-	return t.NewPackage("libxcvt", version, newFromGitLab(
+	return s.NewPackage(t, "libxcvt", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxcvt",
 		"libxcvt-"+version,
@@ -801,7 +801,7 @@ func (t Toolchain) newLibxcvt() (pkg.Artifact, string) {
 	), nil, (*MesonHelper)(nil)), version
 }
 func init() {
-	artifactsM[Libxcvt] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibxcvt,

 		Name:        "libxcvt",
@@ -809,15 +809,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/lib/libxcvt",

 		ID: 235147,
-	}
+	})
 }

-func (t Toolchain) newLibXdmcp() (pkg.Artifact, string) {
+func (t Toolchain) newLibXdmcp(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.1.5"
 		checksum = "N6AJSv9pmeBedFn8KuSIOUGvTken4rkypNWVE2KfPlliwkfIbhfXrt5YHZkBMUHp"
 	)
-	return t.NewPackage("libXdmcp", version, newFromGitLab(
+	return s.NewPackage(t, "libXdmcp", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libxdmcp",
 		"libXdmcp-"+version,
@@ -834,7 +834,7 @@ func (t Toolchain) newLibXdmcp() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[LibXdmcp] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibXdmcp,

 		Name:        "libXdmcp",
@@ -842,15 +842,15 @@ func init() {
 		Website:     "https://gitlab.freedesktop.org/xorg/lib/libxdmcp",

 		ID: 1772,
-	}
+	})
 }

-func (t Toolchain) newXkeyboardConfig() (pkg.Artifact, string) {
+func (t Toolchain) newXkeyboardConfig(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "2.47"
 		checksum = "E03PsPIaRrxPAuKgDGSQyPiJB49wXtyyvdV0lVx3_G-pelMMlaFLkoTDHTHG_qgA"
 	)
-	return t.NewPackage("xkeyboard-config", version, newFromGitLab(
+	return s.NewPackage(t, "xkeyboard-config", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xkeyboard-config/xkeyboard-config",
 		"xkeyboard-config-"+version,
@@ -860,7 +860,7 @@ func (t Toolchain) newXkeyboardConfig() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[XkeyboardConfig] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXkeyboardConfig,

 		Name:        "xkeyboard-config",
@@ -868,15 +868,15 @@ func init() {
 		Website:     "https://www.freedesktop.org/wiki/Software/XKeyboardConfig/",

 		ID: 5191,
-	}
+	})
 }

-func (t Toolchain) newLibpciaccess() (pkg.Artifact, string) {
+func (t Toolchain) newLibpciaccess(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "0.19"
 		checksum = "84H0c_U_7fMqo81bpuwyXGXtk4XvvFH_YK00UiOriv3YGsuAhmbo2IkFhmJnvu2x"
 	)
-	return t.NewPackage("libpciaccess", version, newFromGitLab(
+	return s.NewPackage(t, "libpciaccess", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/lib/libpciaccess",
 		"libpciaccess-"+version,
@@ -888,7 +888,7 @@ func (t Toolchain) newLibpciaccess() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Libpciaccess] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newLibpciaccess,

 		Name:        "libpciaccess",
@@ -900,15 +900,15 @@ func init() {
 		},

 		ID: 1703,
-	}
+	})
 }

-func (t Toolchain) newXserver() (pkg.Artifact, string) {
+func (t Toolchain) newXserver(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "21.1.22"
 		checksum = "prLT2wKecBu5m9w1ThgIt0GvenNpjKXoOyvTiMA1oQTlP0QHh6QiWsdvH3OmUwNo"
 	)
-	return t.NewPackage("xserver", version, newFromGitLab(
+	return s.NewPackage(t, "xserver", version, newFromGitLab(
 		"gitlab.freedesktop.org",
 		"xorg/xserver",
 		"xorg-server-"+version,
@@ -955,7 +955,7 @@ func (t Toolchain) newXserver() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[Xserver] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXserver,

 		Name:        "xserver",
@@ -984,5 +984,5 @@ func init() {
 		},

 		ID: 5250,
-	}
+	})
 }
--- a/internal/rosa/xz.go
+++ b/internal/rosa/xz.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newXZ() (pkg.Artifact, string) {
+func (t Toolchain) newXZ(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "5.8.3"
 		checksum = "nCdayphPGdIdVoAZ2hR4vYlhDG9LeVKho_i7ealTud4Vxy5o5dWe0VwFlN7utuUL"
 	)
-	return t.NewPackage("xz", version, newFromGitHubRelease(
+	return s.NewPackage(t, "xz", version, newFromGitHubRelease(
 		"tukaani-project/xz",
 		"v"+version,
 		"xz-"+version+".tar.bz2",
@@ -18,7 +18,7 @@ func (t Toolchain) newXZ() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	artifactsM[XZ] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newXZ,

 		Name:        "xz",
@@ -26,5 +26,5 @@ func init() {
 		Website:     "https://tukaani.org/xz/",

 		ID: 5277,
-	}
+	})
 }
--- a/internal/rosa/zlib.go
+++ b/internal/rosa/zlib.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newZlib() (pkg.Artifact, string) {
+func (t Toolchain) newZlib(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.3.2"
 		checksum = "KHZrePe42vL2XvOUE3KlJkp1UgWhWkl0jjT_BOvFhuM4GzieEH9S7CioepOFVGYB"
 	)
-	return t.NewPackage("zlib", version, newTar(
+	return s.NewPackage(t, "zlib", version, newTar(
 		"https://www.zlib.net/fossils/zlib-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
@@ -28,7 +28,7 @@ func (t Toolchain) newZlib() (pkg.Artifact, string) {
 	}), version
 }
 func init() {
-	artifactsM[Zlib] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newZlib,

 		Name:        "zlib",
@@ -36,5 +36,5 @@ func init() {
 		Website:     "https://zlib.net/",

 		ID: 5303,
-	}
+	})
 }
--- a/internal/rosa/zstd.go
+++ b/internal/rosa/zstd.go
@@ -2,12 +2,12 @@ package rosa

 import "hakurei.app/internal/pkg"

-func (t Toolchain) newZstd() (pkg.Artifact, string) {
+func (t Toolchain) newZstd(s *S) (pkg.Artifact, string) {
 	const (
 		version  = "1.5.7"
 		checksum = "4XhfR7DwVkwo1R-TmYDAJOcx9YXv9WSFhcFUe3hWEAMmdMLPhFaznCqYIA19_xxV"
 	)
-	return t.NewPackage("zstd", version, newFromGitHubRelease(
+	return s.NewPackage(t, "zstd", version, newFromGitHubRelease(
 		"facebook/zstd",
 		"v"+version,
 		"zstd-"+version+".tar.gz",
@@ -29,7 +29,7 @@ ZSTD_BIN=/cure/programs/zstd /usr/src/zstd/tests/playTests.sh
 	), version
 }
 func init() {
-	artifactsM[Zstd] = Metadata{
+	native.MustRegister(&Artifact{
 		f: Toolchain.newZstd,

 		Name:        "zstd",
@@ -37,5 +37,5 @@ func init() {
 		Website:     "https://facebook.github.io/zstd/",

 		ID: 12083,
-	}
+	})
 }