anchor.diff:  
     google-api-go-client = buildFromGitHub {
       version = 2;
  -    rev = "16ab375f94503bfa0d19db78e96bffbe1a34354f";
  -    date = "2017-03-20";
  +    rev = "fbbaff1827317122a8a0e1b24de25df8417ce87b";
  +    date = "2017-04-21";
       owner = "google";
       repo = "google-api-go-client";
  -    sha256 = "0c35bf490c54ae068da151676675c56c5facdaca82db81e45c5c04897c5951a6";
  +    sha256 = "0v4709clzxcvjrs0473bny46zph9gvj9bxnzx8bczpzrbp97jab7";
       goPackagePath = "google.golang.org/api";
       buildInputs = [
         appengine
  
positive.code:       gx
        stump
      ];
      date = "2017-04-22";
    };
  
    gzip = buildFromGitHub {
  
negative.code: 
    dns = buildFromGitHub {
      version = 2;
      rev = "113c7538ea6d8f429071f901bd26af59cc9676fe";
      date = "2017-04-26";
      owner  = "miekg";
      repo   = "dns";
      sha256 = "0qfyx23xglny4xc8qj9kji30pjkmmjrzv984f5s84sm5p16gsv16";
    };
  
    dnsimple-go = buildFromGitHub {
  