diff --git a/scripts/expand-macos-bundle.mjs b/scripts/expand-macos-bundle.mjs
index 3246b78..13b494f 100644
--- a/scripts/expand-macos-bundle.mjs
+++ b/scripts/expand-macos-bundle.mjs
@@ -46,25 +46,32 @@ if (!existsSync(tarZstPath)) {
   process.exit(0);
 }
 
-function findZstd() {
-  const fromPath = spawnSync("zstd", ["--version"], { encoding: "utf8" });
-  if (fromPath.status === 0) {
-    return "zstd";
+function decompressTarZst(inputPath, outputPath) {
+  const systemZstd = spawnSync("zstd", ["--version"], { encoding: "utf8" });
+  if (systemZstd.status === 0) {
+    return spawnSync("zstd", ["-d", "-f", "-o", outputPath, inputPath], {
+      stdio: "inherit",
+    });
   }
 
   const hostArch = process.arch === "arm64" ? "arm64" : "x64";
-  const electrobunZstd = path.join(
+  const zigZstd = path.join(
     rootDir,
     "node_modules/electrobun/dist-macos-" + hostArch,
     "zig-zstd",
   );
-  if (existsSync(electrobunZstd)) {
-    return electrobunZstd;
+  if (existsSync(zigZstd)) {
+    return spawnSync(
+      zigZstd,
+      ["decompress", "-i", inputPath, "-o", outputPath, "--no-timing"],
+      { stdio: "inherit" },
+    );
   }
 
-  throw new Error(
+  console.error(
     "expand-macos-bundle: zstd not found (install zstd or use electrobun dist binaries)",
   );
+  process.exit(1);
 }
 
 const workDir = path.join(tmpdir(), `farmcontrol-server-expand-${hash}`);
@@ -72,10 +79,7 @@ const tarPath = path.join(workDir, `${hash}.tar`);
 rmSync(workDir, { recursive: true, force: true });
 mkdirSync(workDir, { recursive: true });
 
-const zstd = findZstd();
-const decompress = spawnSync(zstd, ["-d", "-f", "-o", tarPath, tarZstPath], {
-  stdio: "inherit",
-});
+const decompress = decompressTarZst(tarZstPath, tarPath);
 
 if (decompress.status !== 0) {
   console.error("expand-macos-bundle: zstd decompression failed");