anchor.diff:        go-crypto
         jsonx
       ];
  +
  +    preBuild = ''
  +    '';
     };
   
     vault_api = buildFromGitHub {
  
positive.code: 
    google-cloud-go-compute-metadata = buildFromGitHub {
      inherit (google-cloud-go) rev date owner repo sha256 version goPackagePath goPackageAliases meta;
      subPackages = [ "compute/metadata" "internal" ];
      buildInputs = [ net ];
    };
  
    gopcap = buildFromGitHub {
  
negative.code: 
    genproto = buildFromGitHub {
      version = 2;
      date = "2016-11-14";
      rev = "08f135d1a31b6ba454287638a3ce23a55adace6f";
      owner  = "google";
      repo   = "go-genproto";
      goPackagePath = "google.golang.org/genproto";
      sha256 = "0gl02a4pjpknyi95n9ijdsqg479b5dbq9amqrb9g3hlw195qhf64";
      propagatedBuildInputs = [
        grpc
        net
        protobuf
      ];
    };
  
    genproto_protobuf = buildFromGitHub {
      inherit (genproto) version date rev owner repo goPackagePath sha256;
      subPackages = [
        "protobuf"
      ];
      buildInputs = [
        protobuf_genproto
      ];
    };
  
  