anchor.diff:      ++ optional (!webuiSupport) "--disable-webui"
       ++ optional debugSupport "--enable-debug";
   
  -  postInstall = "wrapProgram $out/bin/${
  -    if guiSupport
  -    then "qbittorrent"
  -    else "qbittorrent-nox"
  -  } --prefix PATH : ${makeBinPath [ python3 ]}";
  +  qtWrapperArgs = optional trackerSearch "--prefix PATH : ${makeBinPath [ python3 ]}";
   
     meta = {
       description = "Featureful free software BitTorrent client";
  
positive.code: { mkDerivation, lib, fetchFromGitHub, makeWrapper, pkg-config
  , boost, libtorrent-rasterbar, qtbase, qttools, qtsvg
  , debugSupport ? false
  , guiSupport ? true, dbus ? null # GUI (disable to run headless)
  
negative.code:   enableParallelBuilding = true;
  
    # NOTE: 2018-05-31: CMake is working but it is not officially supported
    nativeBuildInputs = [ pkg-config ];
  
    buildInputs = [ boost libtorrent-rasterbar qtbase qttools qtsvg ]
      ++ optional guiSupport dbus # D(esktop)-Bus depends on GUI support
  