NixOS/nixpkgs — pull request #4793 by bflyblue (2014-11-02 21:26:56+00:00)
Title: ghc-mod 5.2.1.0 - Fix #387, Pattern match failure in GhcPkg

ghc-mod 5.2.0.0 was broken for NixOS - 5.2.1.0 fixes the issue