anchor.diff:  
     grpc = buildFromGitHub {
       version = 3;
  -    date = "2017-05-16";
  -    rev = "3773797869c468b67a55a68c62c709f992f2e36b";
  +    date = "2017-05-17";
  +    rev = "11d93ecdb918872ee841ba3a2dc391aa6d4f57c3";
       owner = "grpc";
       repo = "grpc-go";
  -    sha256 = "19l9w4yihwbd2kba1rhsnby7g7l9ffmj6v67xn7gj5vvf8vsdv4g";
  +    sha256 = "1wl1xw2ndfb5pznwf4is1qdbw1fsz4q83jhg091jsjmxd54scbp1";
       goPackagePath = "google.golang.org/grpc";
       goPackageAliases = [
         "github.com/grpc/grpc-go"
  
positive.code:   };
  
    genproto = buildFromGitHub {
      version = 2;
      date = "2017-04-04";
      rev = "411e09b969b1170a9f0c467558eb4c4c110d9c77";
      owner  = "google";
      repo   = "go-genproto";
      goPackagePath = "google.golang.org/genproto";
      sha256 = "0wn4yflplv9kpf4qahg4fyb0l52513y416wvn9pxrl66rfpig8ic";
      propagatedBuildInputs = [
        grpc
        net
  
negative.code:   };
  
    emoji = buildFromGitHub {
      version = 3;
      owner = "kyokomi";
      repo = "emoji";
      rev = "ddd4753eac3f6480ca86b16cc6c98d26a0935d17";
      sha256 = "00af5gdm74jkp4kkv6gbxgk0j9msyhhcwpm89i5srj6w3zh13b1z";
      date = "2017-05-19";
    };
  
    encoding = buildFromGitHub {
  