diff --git a/cmd/mbf/main.go b/cmd/mbf/main.go
index ed4422b..e342356 100644
--- a/cmd/mbf/main.go
+++ b/cmd/mbf/main.go
@@ -172,6 +172,8 @@ func main() {
 				p = rosa.Go
 			case "gperf":
 				p = rosa.Gperf
+			case "hakurei":
+				p = rosa.Hakurei
 			case "kernel-headers":
 				p = rosa.KernelHeaders
 			case "libXau":
diff --git a/internal/rosa/all.go b/internal/rosa/all.go
index 686422c..4213a07 100644
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -22,6 +22,7 @@ const (
 	Git
 	Go
 	Gperf
+	Hakurei
 	KernelHeaders
 	LibXau
 	Libexpat
diff --git a/internal/rosa/hakurei.go b/internal/rosa/hakurei.go
new file mode 100644
index 0000000..c5f364d
--- /dev/null
+++ b/internal/rosa/hakurei.go
@@ -0,0 +1,83 @@
+package rosa
+
+import (
+	"hakurei.app/internal/pkg"
+)
+
+func (t Toolchain) newHakurei() pkg.Artifact {
+	const (
+		version  = "0.3.3"
+		checksum = "iMN9qzDB000noZ6dOHh_aSdrhRZPopjyWHd0KFVjxjQLQstAOvLYZEZ74btlL0pu"
+	)
+	return t.New("hakurei-"+version, false, []pkg.Artifact{
+		t.Load(Go),
+		t.Load(PkgConfig),
+
+		t.Load(KernelHeaders),
+		t.Load(Libseccomp),
+		t.Load(ACL),
+		t.Load(Attr),
+
+		t.Load(Xproto),
+		t.Load(LibXau),
+		t.Load(XCBProto),
+		t.Load(XCB),
+
+		t.Load(Libffi),
+		t.Load(Libexpat),
+		t.Load(Libxml2),
+		t.Load(Wayland),
+		t.Load(WaylandProtocols),
+	}, nil, []string{
+		"GOCACHE=/tmp/gocache",
+		"CC=clang -O3 -Werror",
+	}, `
+echo '# Building test helper (hostname).'
+go build -v -o /bin/hostname /usr/src/hostname/main.go
+echo
+
+chmod -R +w /usr/src/hakurei
+cd /usr/src/hakurei
+mkdir -p /work/system/{bin,libexec/hakurei}
+
+echo '# Building hakurei.'
+go generate -v ./...
+go build -trimpath -v -o /work/system/libexec/hakurei -ldflags="-s -w
+	-buildid=
+	-extldflags=-static
+	-X hakurei.app/internal/info.buildVersion='v`+version+`'
+	-X hakurei.app/internal/info.hakureiPath=/system/bin/hakurei
+	-X hakurei.app/internal/info.hsuPath=/system/bin/hsu
+	-X main.hakureiPath=/system/bin/hakurei" ./...
+echo
+
+echo '# Testing hakurei.'
+go test -ldflags='-buildid= -extldflags=-static' ./...
+echo
+
+mv \
+	/work/system/libexec/hakurei/{hakurei,hpkg} \
+	/work/system/bin
+`, pkg.Path(AbsUsrSrc.Append("hakurei"), true, pkg.NewHTTPGetTar(
+		nil, "https://git.gensokyo.uk/security/hakurei/archive/"+
+			"v"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	)), pkg.Path(AbsUsrSrc.Append("hostname", "main.go"), false, pkg.NewFile(
+		"hostname.go",
+		[]byte(`
+package main
+
+import "os"
+
+func main() {
+	if name, err := os.Hostname(); err != nil {
+		panic(err)
+	} else {
+		os.Stdout.WriteString(name)
+	}
+}
+`),
+	)))
+}
+func init() { artifactsF[Hakurei] = Toolchain.newHakurei }