The expression needs more attention before it can be built on platforms
other than Linux:
at `haskellPackages_ghc703.ltk' [system = "i686-darwin"]:
assertion failed at `/nix/store/jbcbv6lf44wiy5afsk99sv3vzd1zhg9f-nixpkgs-r28407/pkgs/os-specific/linux/kernel-headers/2.6.32.nix:3:1'
svn path=/nixpkgs/trunk/; revision=28411