anchor.diff:    };
   
     du = buildFromGitHub {
  -    rev    = "3c0690cca16228b97741327b1b6781397afbdb24";
  -    date   = "2015-08-05";
  +    rev = "v1.0.0";
       owner  = "calmh";
       repo   = "du";
       sha256 = "1mv6mkbslfc8giv47kyl97ny0igb3l7jya5hc75sm54xi6g205wa";
  
positive.code:   };
  
    net = buildFromGitHub {
      rev = "6ccd6698c634f5d835c40c1c31848729e0cecda1";
      date = "2016-02-02";
      owner  = "golang";
      repo   = "net";
      sha256 = "10gnjjcgzn7z9l4hyqlammilxigln4m7jriv5apcsdk81ywbjrb5";
      goPackagePath = "golang.org/x/net";
      goPackageAliases = [
        "code.google.com/p/go.net"
  
negative.code:   };
  
    text = buildFromGitHub {
      rev = "db2353fc1b663d79d1001e206afc02a5ec9f4291";
      date = "2016-02-05";
      owner = "golang";
      repo = "text";
      sha256 = "0wn5ikx8fk84acwli9yqlwk2i55iy4bq78zws6n678rz0rana0ab";
      goPackagePath = "golang.org/x/text";
      goPackageAliases = [ "github.com/golang/text" ];
    };
  