anchor.diff:  
     google-cloud-go = buildFromGitHub {
       version = 2;
  -    date = "2017-03-15";
  -    rev = "3f8a5072eb1701e5ede64adbe70a932b9851eb28";
  +    date = "2017-03-16";
  +    rev = "49b49ef3c9d0c5fec4438c6dda687093f6c1f8d8";
       owner = "GoogleCloudPlatform";
       repo = "google-cloud-go";
  -    sha256 = "0bn44a6jrpx4w99z64xzcfwxi2jrwn3pavnab7r2ss0i5v8ikhhl";
  +    sha256 = "03b5sr6gs7nazi9k2ynwh24g807pnpp2s2b8kgiplv012wbmjpjm";
       goPackagePath = "cloud.google.com/go";
       goPackageAliases = [
         "google.golang.org/cloud"
  
positive.code:     version = 2;
      owner = "minio";
      repo = "minio";
      rev = "RELEASE.2016-09-11T17-42-18Z";
      sha256 = "a1e43f383fe94c9e5056c4144d9fa0264d7a44b85bcc12dd7970f1acf9953445";
      buildInputs = [
        amqp
        blake2b-simd
  
negative.code:       net
        protobuf
      ];
      date = "2017-03-16";
    };
  
    ewma = buildFromGitHub {
  