diff --git a/deploy/runtime/boot/hwlab-device-pod.sh b/deploy/runtime/boot/hwlab-device-pod.sh
index 7eb37bf0..3cd6f15d 100644
--- a/deploy/runtime/boot/hwlab-device-pod.sh
+++ b/deploy/runtime/boot/hwlab-device-pod.sh
@@ -8,4 +8,18 @@ export HWLAB_REVISION="${HWLAB_BOOT_COMMIT}"
 export HWLAB_IMAGE="${HWLAB_ENVIRONMENT_IMAGE:-${HWLAB_IMAGE:-}}"
 export HWLAB_IMAGE_DIGEST="${HWLAB_ENVIRONMENT_DIGEST:-${HWLAB_IMAGE_DIGEST:-unknown}}"
 
-exec bun cmd/hwlab-device-pod/main.ts
+bun_bin="${HWLAB_BUN_COMMAND:-}"
+if [ -z "$bun_bin" ]; then
+  if command -v bun >/dev/null 2>&1; then
+    bun_bin="$(command -v bun)"
+  elif [ -x /usr/local/bin/bun ]; then
+    bun_bin="/usr/local/bin/bun"
+  elif [ -x ./node_modules/.bin/bun ]; then
+    bun_bin="./node_modules/.bin/bun"
+  else
+    echo "hwlab-device-pod boot failed: bun not found" >&2
+    exit 127
+  fi
+fi
+
+exec "$bun_bin" cmd/hwlab-device-pod/main.ts
diff --git a/deploy/runtime/launcher/hwlab-env-reuse-launcher.ts b/deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
index 36b28689..04ffc123 100644
--- a/deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
+++ b/deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
@@ -12,6 +12,7 @@ if (!/^[a-f0-9]{40}$/u.test(bootCommit)) fail("HWLAB_BOOT_COMMIT must be a full
 if (path.isAbsolute(bootSh) || bootSh.split("/").includes("..")) fail("HWLAB_BOOT_SH must be repo-relative");
 
 const readUrl = process.env.HWLAB_BOOT_READ_URL || mirrorReadUrl(bootRepo);
+process.env.HWLAB_BUN_COMMAND ||= process.execPath;
 mkdirSync(path.dirname(checkoutDir), { recursive: true });
 rmSync(checkoutDir, { recursive: true, force: true });
 run("git", ["clone", "--no-checkout", readUrl, checkoutDir], "/");