anchor.diff:  
     gocql = buildFromGitHub {
       version = 3;
  -    rev = "3e8b36f5e9e52cdeb265f385808c504a53db55fc";
  +    rev = "ca7d33956650d92d29e6db7fe901e23d0f0e3359";
       owner  = "gocql";
       repo   = "gocql";
  -    sha256 = "1dwd4l728r7g7ra6n2wchibw9i2g3j3b3fqwq7rjr6bffi5sjhkb";
  +    sha256 = "1i6mcfd57g98v3fp8ba03rgh804wq258y18czl9mnwcvqba0rqd4";
       propagatedBuildInputs = [
         inf_v0
         snappy
         hailocab_go-hostpool
         net
       ];
  -    date = "2017-05-31";
  +    date = "2017-06-15";
     };
   
     gofuzz = buildFromGitHub {
  
positive.code:     version = 3;
      owner = "olivere";
      repo = "elastic";
      rev = "v3.0.68";
      sha256 = "1rasiq7xw87n25cyjsmbq5r5l0a4sl6a4lcbmkd7zs9vib951qgb";
      goPackagePath = "gopkg.in/olivere/elastic.v3";
      propagatedBuildInputs = [
        net
  
negative.code: 
    mysql = buildFromGitHub {
      version = 3;
      rev = "8fefef06da7707b5a3cda42195a6b409c9c9ab5c";
      owner  = "go-sql-driver";
      repo   = "mysql";
      sha256 = "16n30fk8p6axv0c4bg0j5djcpcb4h1pizmdn74zc7jzmcwyxvkmv";
      postPatch = ''
        grep -r '+build appengine' -l | xargs rm
      '';
      date = "2017-06-16";
    };
  
    net-rpc-msgpackrpc = buildFromGitHub {
  