anchor.diff:      repo   = "fileutil";
       sha256 = "1imk4wjgfhyb4m8dm8qbm5lz263lyb27602v3mx8j3dzqjpagg8g";
       buildInputs = [ mathutil ];
  +  };
  +
  +  fs = buildFromGitHub {
  +    date = "2013-11-07";
  +    rev = "2788f0dbd16903de03cb8186e5c7d97b69ad387b";
  +    owner  = "kr";
  +    repo   = "fs";
  +    sha256 = "1c0fipl4rsh0v5liq1ska1dl83v3llab4k6lm8mvrx9c4dyp71ly";
     };
   
     fsnotify.v0 = buildGoPackage rec {
  
positive.code:     ];
      excludedPackages = [
        "tests"
      ];
    };
  
  
negative.code:     owner = "whyrusleeping";
      repo = "gx";
      sha256 = "1v0q7b2jip3xgwinly6lmcqwq351ynlk8lr0876m2ap97d5yk790";
      propagatedBuildInputs = [
        go-multiaddr
        go-multihash
        go-multiaddr-net
  