anchor.diff:  , systemd
   , zlib
   , pcre
  +, libb64
  +, libutp
  +, miniupnpc
  +, dht
  +, libnatpmp
     # Build options
   , enableGTK3 ? false
   , gtk3
  
positive.code:         * Full encryption, DHT, and PEX support
      '';
      homepage = "http://www.transmissionbt.com/";
      license = lib.licenses.gpl2; # parts are under MIT
      maintainers = with lib.maintainers; [ astsmtl vcunat wizeman ];
      platforms = lib.platforms.unix;
    };
  
negative.code:     libevent
      zlib
      pcre
      libb64
      libutp
      miniupnpc
      dht
      libnatpmp
    ]
    ++ lib.optionals enableQt [ qt5.qttools qt5.qtbase ]
    ++ lib.optionals enableGTK3 [ gtk3 xorg.libpthreadstubs ]
  