nixpkgs/pkgs/misc/bleeding-edge-fetch-info/hsc2hs.nix

 args: with args; fetchurl { 
  url = http://mawercer.de/~nix/repos/hsc2hs.tar.gz;
  sha256 = "3179eba85e56f30250793dbb612ffb8ad869e37297a185c2e0fb29134afb73af";}