anchor.diff:      version = 3;
       owner = "minio";
       repo = "minio";
  -    rev = "8d584bd81911f7d17b5030b24f3279b8d12dfa8d";
  -    sha256 = "1mpdngh8mw3z5y21ryl4dg77ls0yw44rdr761501a63frvflfism";
  +    rev = "dcdb07433a2a68df0cc20beda299e1e46fcfe137";
  +    sha256 = "05559w8fmwj1jsp8bbbx5f3xl715y03lqwa3z8kkx8zrl2cb0cvm";
       propagatedBuildInputs = [
         amqp
         atomic
  
positive.code: 
    bbolt = buildFromGitHub {
      version = 3;
      rev = "60725ac8b25b78805aa8e2eaee714c62c55b1527";
      owner  = "coreos";
      repo   = "bbolt";
      sha256 = "133xphrwsmih5fk10kj6cckddb8z123lfcy21d6vmwshmd6kpi38";
      date = "2017-10-31";
      buildInputs = [
        sys
      ];
  
negative.code: 
    grpc-gateway = buildFromGitHub {
      version = 3;
      rev = "8cc3a55af3bcf171a1c23a90c4df9cf591706104";
      owner = "grpc-ecosystem";
      repo = "grpc-gateway";
      sha256 = "18czkx0cjmkv26nlaffp9nryihlh2prhd051qzfxslgwz1rzlh86";
      propagatedBuildInputs = [
        genproto
        glog
  