anchor.diff:      propagatedBuildInputs = [
         net
         sys
  +    ];
  +  };
  +
  +  gophercloud = buildFromGitHub {
  +    version = 3;
  +    rev = "8c5c0c21b452d5d9faf056bbdf5bd59333097c6a";
  +    owner = "gophercloud";
  +    repo = "gophercloud";
  +    sha256 = "00ffif7748wib616vrqycn6v765nl9v0c45n6dcxk38yjh3vfi1l";
  +    date = "2017-10-03";
  +    excludedPackages = "test";
  +    propagatedBuildInputs = [
  +      crypto
  +      yaml_v2
       ];
     };
   
  
positive.code:       net
      ];
      date = "2017-09-28";
    };
  
    go-stream-muxer = buildFromGitHub {
  
negative.code:     '';
    };
  
    opentracing-go = buildFromGitHub {
      version = 3;
      owner = "opentracing";
      repo = "opentracing-go";
      rev = "v1.0.2";
      sha256 = "0g9h4slaiik7fa0rx04jxdjrn9i9w597ws95hmip125jbjafvqc6";
      propagatedBuildInputs = [
        net
      ];
    };
  
    osext = buildFromGitHub {
      version = 3;
      date = "2017-05-10";
  