anchor.diff:  
     genproto = buildFromGitHub {
       version = 2;
  -    date = "2017-03-17";
  -    rev = "de9f5e90fe9b278809363f08c2072d2f2a429de7";
  +    date = "2017-04-04";
  +    rev = "411e09b969b1170a9f0c467558eb4c4c110d9c77";
       owner  = "google";
       repo   = "go-genproto";
       goPackagePath = "google.golang.org/genproto";
  -    sha256 = "12p45lr6h9rr4hzl2z773xzxwn66mq4pyvx0wv2zqi3cdsy1c5fv";
  +    sha256 = "0wn4yflplv9kpf4qahg4fyb0l52513y416wvn9pxrl66rfpig8ic";
       propagatedBuildInputs = [
         grpc
         net
  
positive.code:     version = 2;
      owner = "rfjakob";
      repo = "eme";
      rev = "01668ae55fe0b79a483095689043cce3e80260db";
      date = "2017-03-05";
      sha256 = "1067hdmfwb74b93idlhr31nkj9qslr1569w9srgnbhq36l4r32in";
      meta.useUnstable = true;
    };
  
  
negative.code:       net
        protobuf
      ];
    };
  
  
  