anchor.diff:  
     netlink = buildFromGitHub {
       version = 3;
  -    rev = "58c32ae2d72285baf322aaff05213c2fba8fb8a2";
  +    rev = "a66e14955d30c6f0806ad60ca197e6926bcd0b10";
       owner  = "vishvananda";
       repo   = "netlink";
  -    sha256 = "1bfnsa3yzs6q9fq6cyrpd5z0nhndbvksn350maq9va8brjlxcnkn";
  -    date = "2017-05-07";
  +    sha256 = "0zcvh5n2wn6iray1rzfiaci3lwpfcwsajk3npak9fm7hmip0hjqi";
  +    date = "2017-05-16";
       propagatedBuildInputs = [
         netns
       ];
  
positive.code:   };
  
    syncthing = buildFromGitHub rec {
      version = 2;
      rev = "v0.14.27";
      owner = "syncthing";
      repo = "syncthing";
      sha256 = "06i7ci4zfi78cgsb27mndsbw6d7vcwb4fn3nq3wyfpdql5hmmvi4";
      buildFlags = [ "-tags noupgrade" ];
      buildInputs = [
        AudriusButkevicius_cli
  
negative.code:     version = 3;
      owner = "btcsuite";
      repo = "btcd";
      date = "2017-05-15";
      rev = "40f4997b95ac18e20c5ffc54dc3c84036b1f1bf5";
      sha256 = "1xzra60w4rwi4vvj64s04wv0dahcn61kvgd2b1nk1gcjxfz2fwd7";
      subPackages = [
        "btcec"
      ];
  