diff --git a/.devcontainer/post-create.sh b/.devcontainer/post-create.sh
new file mode 100644
index 0000000..7ce04ed
--- /dev/null
+++ b/.devcontainer/post-create.sh
@@ -0,0 +1,10 @@
+/bin/bash
+
+set -e
+
+if [[ "${CODESPACES}" == true ]]; then
+  echo "Fixing permissions of /tmp for GitHub Codespaces..." >&2
+  sudo chmod 1777 /tmp
+fi
+
+pnpm install