NixOS/nixpkgs — pull request #4473 by aristidb (2014-10-11 10:55:25+00:00)
Title: Xmobar 0.22

Requires mtl 2.2, so I moved it to all-packages and gave it that... Also disabled testing because doctest (used by distributive) uses the GHC API.

Is there a better way?

CC @peti @rejuvyesh