diff --git a/internal/rosa/go.go b/internal/rosa/go.go
index 52c5cc7a..ebdaa8e2 100644
--- a/internal/rosa/go.go
+++ b/internal/rosa/go.go
@@ -56,16 +56,15 @@ ln -s \
 
 func init() {
 	const (
-		version  = "1.26.4"
-		checksum = "fpqJlxa41wKRtbnviYNLk9VxgcL-5oIEDxsriF8svU6kNwQW70oRRA9gTz_ImVoB"
+		version  = "1.25.12"
+		checksum = "XNrGD_boJl2-El_a_T3BuTcMin_WPoU-FGddcNG8dcXA8n2QuxZB7kaUaCWu60QX"
 	)
 	meta := Metadata{
-		Name:        "go",
-		Description: "the Go programming language toolchain",
+		Name:        "go-bootstrap",
+		Description: "the Go programming language toolchain (bootstrap)",
 		Website:     "https://go.dev",
 		Version:     version,
-
-		ID: 1227,
+		Exclude:     true,
 	}
 	native.MustRegister(meta.Name, func(t Toolchain) (*Metadata, pkg.Artifact) {
 		var (
@@ -152,8 +151,8 @@ sed -i \
 		)
 
 		go125 := t.newGo(
-			"1.25.12",
-			"XNrGD_boJl2-El_a_T3BuTcMin_WPoU-FGddcNG8dcXA8n2QuxZB7kaUaCWu60QX",
+			version,
+			checksum,
 			[]string{"CGO_ENABLED=0"}, `
 sed -i \
 	's,/lib/ld-musl-`+t.linuxArch()+`.so.1,/system/bin/linker,' \
@@ -165,23 +164,6 @@ rm \
 `, go123,
 		)
 
-		return &meta, t.newGo(
-			version,
-			checksum,
-			finalEnv, `
-sed -i \
-	's,/lib/ld-musl-`+t.linuxArch()+`.so.1,/system/bin/linker,' \
-	cmd/link/internal/`+t.arch+`/obj.go
-sed -i \
-	's/cpu.X86.HasAVX512VBMI/& \&\& cpu.X86.HasPOPCNT/' \
-	internal/runtime/gc/scan/scan_amd64.go
-
-rm \
-	os/root_unix_test.go \
-	cmd/cgo/internal/testsanitizers/tsan_test.go \
-	cmd/cgo/internal/testsanitizers/cshared_test.go
-`, go125,
-		)
-
+		return &meta, go125
 	})
 }
diff --git a/internal/rosa/package/go.az b/internal/rosa/package/go.az
new file mode 100644
index 00000000..63ff6832
--- /dev/null
+++ b/internal/rosa/package/go.az
@@ -0,0 +1,59 @@
+package go {
+	description = "the Go programming language toolchain";
+	website = "https://go.dev";
+	anitya = 1227;
+
+	version# = "1.26.4";
+	source = remoteTar {
+		url = "https://go.dev/dl/go"+version+".src.tar.gz";
+		checksum = "fpqJlxa41wKRtbnviYNLk9VxgcL-5oIEDxsriF8svU6kNwQW70oRRA9gTz_ImVoB";
+		compress = gzip;
+	};
+
+	env = [
+		"CC=cc",
+		"GOCACHE=/tmp/gocache",
+		"GOROOT_BOOTSTRAP=/system/go",
+		"TMPDIR=/dev/shm/go",
+	];
+
+	enterSource = true;
+
+	exec = generic {
+		inPlace = true;
+		build = `
+mkdir /work/system/ "${TMPDIR}"
+cp -r . /work/system/go
+cd /work/system/go/src/
+chmod -R +w ..
+
+sed -i \
+	's,/lib/ld-musl-`+linuxArch+`.so.1,/system/bin/linker,' \
+	cmd/link/internal/`+arch+`/obj.go
+sed -i \
+	's/cpu.X86.HasAVX512VBMI/& \&\& cpu.X86.HasPOPCNT/' \
+	internal/runtime/gc/scan/scan_amd64.go
+
+rm \
+	os/root_unix_test.go \
+	cmd/cgo/internal/testsanitizers/tsan_test.go \
+	cmd/cgo/internal/testsanitizers/cshared_test.go
+
+set +u
+. ./make.bash "$@" --no-banner
+set -u
+`;
+		check = "bash run.bash --no-rebuild\n";
+		install = `
+../bin/go tool dist banner # print build info
+
+mkdir /work/system/bin
+ln -s \
+	../go/bin/go \
+	../go/bin/gofmt \
+	/work/system/bin
+`;
+	};
+
+	inputs = [ bash, go-bootstrap ];
+}