839d7ae743
Add detection logic to distinguish between: - nix-update-script (standard packages like beads, td, mem0, etc.) - Custom scripts (like n8n's update.sh that strips 'n8n@' prefix) For custom scripts, run them directly with standard env vars: - UPDATE_NIX_NAME, UPDATE_NIX_PNAME - UPDATE_NIX_OLD_VERSION, UPDATE_NIX_ATTR_PATH This ensures n8n only gets stable releases via its custom script.