anchor.diff:    };
   
     go-github = buildFromGitHub {
  -    date = "2016-03-30";
  -    rev = "61c6c14bbe32b152fa22f0ac2a14b9b7123a82f5";
  +    date = "2016-04-21";
  +    rev = "81ea1e5cb324404cd87c66d2a1050c7c31a2121b";
       owner = "google";
       repo = "go-github";
  -    sha256 = "09p3zd54lbz7wzb6lr8chsgi5h3iidrihd550nrbmj1bn4qpxal3";
  +    sha256 = "0b7bvspw4rnfzs8s776dz2mxfj0m3x7idjhv5yzn6gk3yn2k56x6";
       buildInputs = [ oauth2 ];
       propagatedBuildInputs = [ go-querystring ];
     };
  
positive.code:   };
  
    go-zookeeper = buildFromGitHub {
      rev = "218e9c81c0dd8b3b18172b2bbfad92cc7d6db55f";
      date = "2015-11-02";
      owner  = "samuel";
      repo   = "go-zookeeper";
      sha256 = "09qg7jmcg70c2lgwiw8y5pxrk1yc7f9akwfb542hb3ksd98c8j1k";
    };
  
    lint = buildFromGitHub {
  
negative.code:   };
  
    gx-go = buildFromGitHub {
      rev = "v1.2.0";
      owner = "whyrusleeping";
      repo = "gx-go";
      sha256 = "04d2fj1jy41zddpflv9b6wilyrsp56a8na0km401fgn7hj2fri7v";
      buildInputs = [
        codegangsta-cli
        fs
  