anchor.diff:      meta.autoUpdate = false;
     };
   
  +  packngo = buildFromGitHub {
  +    version = 6;
  +    owner = "packethost";
  +    repo = "packngo";
  +    date = "2018-07-24";
  +    rev = "7e9e620eb59bec157d17a8fb9ca3f2dbbe0b4a7f";
  +    sha256 = "0k4h63hxvwgk6jbm3khq09pd29q87zm95lvjfxq2h7cr84gxmlcx";
  +  };
  +
     paho-mqtt-golang = buildFromGitHub {
       version = 6;
       owner = "eclipse";
  
positive.code:     propagatedBuildInputs = [
        go-digest
        docker_go-metrics
        logrus
        mux
        net
  
negative.code:       circbuf
        columnize
        copystructure
        coredns
        dns
        errors
        go-bindata-assetfs
  