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