anchor.diff:        crypto
         sys
       ];
  +    meta.useUnstable = true;
  +    date = "2018-02-13";
     };
   
     logutils = buildFromGitHub {
  
positive.code:   };
  
    logrus = buildFromGitHub {
      version = 3;
      rev = "v1.0.4";
      owner = "sirupsen";
      repo = "logrus";
      sha256 = "1z2vw438lmva6khkmys1fprfk8a62mxd1klqbaws3lvvw74ys41j";
      goPackageAliases = [
        "github.com/Sirupsen/logrus"
      ];
  
negative.code:     ];
      propagatedBuildInputs = [
      ];
      preBuild = null;
    };
  
    geoip2-golang = buildFromGitHub {
  