diff --git a/internal/rosa/bison.go b/internal/rosa/bison.go
new file mode 100644
index 00000000..b79ed9e1
--- /dev/null
+++ b/internal/rosa/bison.go
@@ -0,0 +1,78 @@
+package rosa
+
+import (
+	"slices"
+	"strconv"
+	"strings"
+
+	"hakurei.app/internal/pkg"
+)
+
+// skipGNUTests generates a string for skipping specific tests by number in a
+// GNU test suite. This is nontrivial because the test suite does not support
+// excluding tests in any way, so ranges for all but the skipped tests have to
+// be specified instead.
+//
+// For example, to skip test 764, ranges around the skipped test must be
+// specified:
+//
+//	1-763 765-
+//
+// Tests are numbered starting from 1. The resulting string is unquoted.
+func skipGNUTests(tests ...int) string {
+	tests = slices.Clone(tests)
+	slices.Sort(tests)
+
+	var buf strings.Builder
+
+	if tests[0] != 1 {
+		buf.WriteString("1-")
+	}
+
+	for i, n := range tests {
+		if n != 1 && (i == 0 || tests[i-1] != n-1) {
+			buf.WriteString(strconv.Itoa(n - 1))
+			buf.WriteString(" ")
+		}
+		if i == len(tests)-1 || tests[i+1] != n+1 {
+			buf.WriteString(strconv.Itoa(n + 1))
+			buf.WriteString("-")
+		}
+	}
+	return buf.String()
+}
+
+func (t Toolchain) newBison() (pkg.Artifact, string) {
+	const (
+		version  = "3.8.2"
+		checksum = "BhRM6K7URj1LNOkIDCFDctSErLS-Xo5d9ba9seg10o6ACrgC1uNhED7CQPgIY29Y"
+	)
+	return t.NewPackage("bison", version, newTar(
+		"https://ftpmirror.gnu.org/gnu/bison/bison-"+version+".tar.gz",
+		checksum,
+		pkg.TarGzip,
+	), nil, &MakeHelper{
+		Check: []string{
+			"TESTSUITEFLAGS=" + jobsFlagE + "' " + skipGNUTests(
+				// clang miscompiles (SIGILL)
+				764,
+			) + "'",
+			"check",
+		},
+	},
+		M4,
+		Diffutils,
+		Sed,
+	), version
+}
+func init() {
+	native.MustRegister(&Artifact{
+		f: Toolchain.newBison,
+
+		Name:        "bison",
+		Description: "a general-purpose parser generator",
+		Website:     "https://www.gnu.org/software/bison/",
+
+		ID: 193,
+	})
+}
diff --git a/internal/rosa/gnu_test.go b/internal/rosa/bison_test.go
similarity index 100%
rename from internal/rosa/gnu_test.go
rename to internal/rosa/bison_test.go
diff --git a/internal/rosa/gnu.go b/internal/rosa/package/gcc/musl-legacy-lfs.patch
similarity index 51%
rename from internal/rosa/gnu.go
rename to internal/rosa/package/gcc/musl-legacy-lfs.patch
index 9ec83da4..3643fea9 100644
--- a/internal/rosa/gnu.go
+++ b/internal/rosa/package/gcc/musl-legacy-lfs.patch
@@ -1,145 +1,4 @@
-package rosa
-
-import (
-	"slices"
-	"strconv"
-	"strings"
-
-	"hakurei.app/internal/pkg"
-)
-
-// skipGNUTests generates a string for skipping specific tests by number in a
-// GNU test suite. This is nontrivial because the test suite does not support
-// excluding tests in any way, so ranges for all but the skipped tests have to
-// be specified instead.
-//
-// For example, to skip test 764, ranges around the skipped test must be
-// specified:
-//
-//	1-763 765-
-//
-// Tests are numbered starting from 1. The resulting string is unquoted.
-func skipGNUTests(tests ...int) string {
-	tests = slices.Clone(tests)
-	slices.Sort(tests)
-
-	var buf strings.Builder
-
-	if tests[0] != 1 {
-		buf.WriteString("1-")
-	}
-
-	for i, n := range tests {
-		if n != 1 && (i == 0 || tests[i-1] != n-1) {
-			buf.WriteString(strconv.Itoa(n - 1))
-			buf.WriteString(" ")
-		}
-		if i == len(tests)-1 || tests[i+1] != n+1 {
-			buf.WriteString(strconv.Itoa(n + 1))
-			buf.WriteString("-")
-		}
-	}
-	return buf.String()
-}
-
-func (t Toolchain) newBison() (pkg.Artifact, string) {
-	const (
-		version  = "3.8.2"
-		checksum = "BhRM6K7URj1LNOkIDCFDctSErLS-Xo5d9ba9seg10o6ACrgC1uNhED7CQPgIY29Y"
-	)
-	return t.NewPackage("bison", version, newTar(
-		"https://ftpmirror.gnu.org/gnu/bison/bison-"+version+".tar.gz",
-		checksum,
-		pkg.TarGzip,
-	), nil, &MakeHelper{
-		Check: []string{
-			"TESTSUITEFLAGS=" + jobsFlagE + "' " + skipGNUTests(
-				// clang miscompiles (SIGILL)
-				764,
-			) + "'",
-			"check",
-		},
-	},
-		M4,
-		Diffutils,
-		Sed,
-	), version
-}
-func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newBison,
-
-		Name:        "bison",
-		Description: "a general-purpose parser generator",
-		Website:     "https://www.gnu.org/software/bison/",
-
-		ID: 193,
-	})
-}
-
-func (t Toolchain) newBinutils() (pkg.Artifact, string) {
-	const (
-		version  = "2.46.0"
-		checksum = "4kK1_EXQipxSqqyvwD4LbiMLFKCUApjq6PeG4XJP4dzxYGqDeqXfh8zLuTyOuOVR"
-	)
-	return t.NewPackage("binutils", version, newTar(
-		"https://ftpmirror.gnu.org/gnu/binutils/binutils-"+version+".tar.bz2",
-		checksum,
-		pkg.TarBzip2,
-	), nil, (*MakeHelper)(nil),
-		Bash,
-	), version
-}
-func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newBinutils,
-
-		Name:        "binutils",
-		Description: "a collection of binary tools",
-		Website:     "https://www.gnu.org/software/binutils/",
-
-		ID: 7981,
-	})
-}
-
-func (t Toolchain) newGCC() (pkg.Artifact, string) {
-	const (
-		version  = "16.1.0"
-		checksum = "4ASoWbxaA2FW7PAB0zzHDPC5XnNhyaAyjtDPpGzceSLeYnEIXsNYZR3PA_Zu5P0K"
-	)
-
-	var configureExtra []KV
-	switch t.arch {
-	case "amd64", "arm64":
-		configureExtra = append(configureExtra, KV{"with-multilib-list", "''"})
-	}
-
-	return t.NewPackage("gcc", version, newTar(
-		"https://ftp.tsukuba.wide.ad.jp/software/gcc/releases/"+
-			"gcc-"+version+"/gcc-"+version+".tar.gz",
-		checksum,
-		pkg.TarGzip,
-	), &PackageAttr{
-		Patches: []KV{
-			{"musl-off64_t-loff_t", `diff --git a/libgo/sysinfo.c b/libgo/sysinfo.c
-index 180f5c31d74..44d7ea73f7d 100644
---- a/libgo/sysinfo.c
-+++ b/libgo/sysinfo.c
-@@ -365,11 +365,7 @@ enum {
- typedef loff_t libgo_loff_t_type;
- #endif
-
--#if defined(HAVE_OFF64_T)
--typedef off64_t libgo_off_t_type;
--#else
- typedef off_t libgo_off_t_type;
--#endif
-
- // The following section introduces explicit references to types and
- // constants of interest to support bootstrapping libgo using a
-`},
-
-			{"musl-legacy-lfs", `diff --git a/libgo/go/internal/syscall/unix/at_largefile.go b/libgo/go/internal/syscall/unix/at_largefile.go
+diff --git a/libgo/go/internal/syscall/unix/at_largefile.go b/libgo/go/internal/syscall/unix/at_largefile.go
 index 82e0dcfd074..16151ecad1b 100644
 --- a/libgo/go/internal/syscall/unix/at_largefile.go
 +++ b/libgo/go/internal/syscall/unix/at_largefile.go
@@ -267,62 +126,3 @@ index f84860891e6..7efc9615985 100644
  }
 
  #endif
-`},
-		},
-
-		ScriptEarly: `
-ln -s system/lib /
-ln -s system/lib /work/
-`,
-
-		// GCC spends most of its time in its many configure scripts, however
-		// it also saturates the CPU for a consequential amount of time.
-		Flag: TExclusive,
-	}, &MakeHelper{
-		Configure: append([]KV{
-			{"disable-multilib"},
-			{"enable-default-pie"},
-			{"disable-nls"},
-			{"with-gnu-as"},
-			{"with-gnu-ld"},
-			{"with-system-zlib"},
-			{"enable-languages", "c,c++,go"},
-			{"with-native-system-header-dir", "/system/include"},
-		}, configureExtra...),
-		Make: []string{
-			"BOOT_CFLAGS='-O2 -g'",
-			"bootstrap",
-		},
-
-		// This toolchain is hacked to pieces, it is not expected to ever work
-		// well in its current state. That does not matter as long as the
-		// toolchain it produces passes its own test suite.
-		SkipCheck: true,
-	},
-		Binutils,
-
-		MPC,
-		Zlib,
-		Libucontext,
-		KernelHeaders,
-	), version
-}
-func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newGCC,
-
-		Name:        "gcc",
-		Description: "The GNU Compiler Collection",
-		Website:     "https://www.gnu.org/software/gcc/",
-
-		Dependencies: P{
-			Binutils,
-
-			MPC,
-			Zlib,
-			Libucontext,
-		},
-
-		ID: 6502,
-	})
-}
diff --git a/internal/rosa/package/gcc/musl-off64_t-loff_t.patch b/internal/rosa/package/gcc/musl-off64_t-loff_t.patch
new file mode 100644
index 00000000..33a25a8d
--- /dev/null
+++ b/internal/rosa/package/gcc/musl-off64_t-loff_t.patch
@@ -0,0 +1,16 @@
+diff --git a/libgo/sysinfo.c b/libgo/sysinfo.c
+index 180f5c31d74..44d7ea73f7d 100644
+--- a/libgo/sysinfo.c
++++ b/libgo/sysinfo.c
+@@ -365,11 +365,7 @@ enum {
+ typedef loff_t libgo_loff_t_type;
+ #endif
+
+-#if defined(HAVE_OFF64_T)
+-typedef off64_t libgo_off_t_type;
+-#else
+ typedef off_t libgo_off_t_type;
+-#endif
+
+ // The following section introduces explicit references to types and
+ // constants of interest to support bootstrapping libgo using a
diff --git a/internal/rosa/package/gcc/package.az b/internal/rosa/package/gcc/package.az
new file mode 100644
index 00000000..ce59641f
--- /dev/null
+++ b/internal/rosa/package/gcc/package.az
@@ -0,0 +1,87 @@
+package binutils {
+	description = "a collection of binary tools";
+	website = "https://www.gnu.org/software/binutils";
+	anitya = 7981;
+
+	version* = "2.46.0";
+	source = remoteTar {
+		url = "https://ftpmirror.gnu.org/gnu/binutils/binutils-"+version+".tar.bz2";
+		checksum = "4kK1_EXQipxSqqyvwD4LbiMLFKCUApjq6PeG4XJP4dzxYGqDeqXfh8zLuTyOuOVR";
+		compress = bzip2;
+	};
+
+	exec = make {};
+
+	inputs = [ bash ];
+}
+
+package gcc {
+	description = "The GNU Compiler Collection";
+	website = "https://www.gnu.org/software/gcc";
+	anitya = 6502;
+
+	version* = "16.1.0";
+	source = remoteTar {
+		url = "https://ftp.tsukuba.wide.ad.jp/software/gcc/releases/"+
+			"gcc-"+version+"/gcc-"+version+".tar.gz";
+		checksum = "4ASoWbxaA2FW7PAB0zzHDPC5XnNhyaAyjtDPpGzceSLeYnEIXsNYZR3PA_Zu5P0K";
+		compress = gzip;
+	};
+	patches = [
+		"musl-off64_t-loff_t.patch",
+		"musl-legacy-lfs.patch",
+	];
+
+	// GCC spends most of its time in its many configure scripts, however
+	// it also saturates the CPU for a consequential amount of time.
+	exclusive = true;
+
+	early = `
+ln -s system/lib /
+ln -s system/lib /work/
+`;
+
+	exec = make {
+		configure = {
+			"disable-multilib";
+			"enable-default-pie";
+			"disable-nls";
+			"with-gnu-as";
+			"with-gnu-ld";
+			"with-system-zlib";
+			"enable-languages": "c,c++,go";
+			"with-native-system-header-dir": "/system/include";
+
+			"with-multilib-list": arch {
+				amd64, arm64 = "''";
+			};
+		};
+
+		make = [
+			"BOOT_CFLAGS='-O2 -g'",
+			"bootstrap",
+		];
+
+		// This toolchain is hacked to pieces, it is not expected to ever work
+		// well in its current state. That does not matter as long as the
+		// toolchain it produces passes its own test suite.
+		skipCheck = true;
+	};
+
+	inputs = [
+		binutils,
+
+		mpc,
+		zlib,
+		libucontext,
+		kernel-headers,
+	];
+
+	runtime = [
+		binutils,
+
+		mpc,
+		zlib,
+		libucontext,
+	];
+}