diff --git a/frontend/publish.sh b/frontend/publish.sh
index 9c374f0191..77419bf38b 100755
--- a/frontend/publish.sh
+++ b/frontend/publish.sh
@@ -1,2 +1,8 @@
+#!/usr/bin/env bash
+# Abort if the package build fails — otherwise npm publish ships the stale
+# package/ directory left over from the last successful build.
+set -euo pipefail
+cd "$(dirname "$0")"
+
 npm run package
 npm publish