diff --git a/main.go b/main.go
index baae6dd..1907ef8 100644
--- a/main.go
+++ b/main.go
@@ -19,6 +19,7 @@ var (
 	out           = flag.String("out", ".", "where to save squashfs images to")
 	tsTarballPath = flag.String("tarball", "./var/tailscale_1.24.2_amd64.tgz", "path to tailscale tarball on disk")
 	distro        = flag.String("distro", "steamos", "distro to stamp into system extension")
+	versionID     = flag.String("version-id", "3.2", "The current version of SteamOS")
 
 	//go:embed tailscaled.service
 	systemdService []byte
@@ -96,6 +97,7 @@ func main() {
 	}
 
 	fmt.Fprintln(fout, "SYSEXT_LEVEL=1.0")
+	fmt.Fprintf(fout, "VERSION_ID=%s")
 	fmt.Fprintf(fout, "ID=%s", *distro)
 
 	err = fout.Close()
@@ -118,13 +120,12 @@ func main() {
 		log.Fatal(err)
 	}
 
-	binPath, err := exec.LookPath("mksquashfs")
+	binPath, err := exec.LookPath("tar")
 	if err != nil {
 		log.Fatal(err)
 	}
-
-	sp := strings.Split(filepath.Base(*tsTarballPath), "_")
-	cmd := exec.Command(binPath, tmpDir, fmt.Sprintf("%s/tailscale_sysext_%s.raw", *out, sp[1]), "-quiet", "-noappend", "-all-root", "-root-mode", "755", "-b", "1M", "-comp", "xz", "-Xdict-size", "100%")
+	cmd := exec.Command(binPath, "czf", fmt.Sprintf("%s/tailscale_sysext_%s.tar.gz", *out, sp[1]), "usr")
+	cmd.Dir = tmpDir
 	cmd.Stderr = os.Stderr
 	cmd.Stdout = os.Stdout
 	if err := cmd.Run(); err != nil {