Excerpts from Yury G. Kudryashov's message of Wed Aug 18 18:21:16 +0200 2010: > What do you think about adding pre-commit hook that rejects commits that > lead to evaluation errors? What else should we check? Coding style (tabs, > trailing spaces)? nixpgks-utils has a nixpkgs-utils-check-nixpkgs command see wiki. That could be a starting point. Marc Weber