anchor.diff:  
     nativeBuildInputs = [ pkgconfig qmake lndir ];
   
  -  buildInputs = [ dbus ];
  +  buildInputs = [ dbus sip ];
   
     propagatedBuildInputs = [
  -    sip qtbase qtsvg qtwebkit qtwebengine
  +    qtbase qtsvg qtwebkit qtwebengine
     ] ++ lib.optional (!isPy3k) enum34 ++ lib.optional withWebSockets qtwebsockets ++ lib.optional withConnectivity qtconnectivity;
   
     configurePhase = ''
  
positive.code:   '';
  
    postInstall = ''
      ln -s ${sip}/${python.sitePackages}/PyQt5/* $out/${python.sitePackages}/PyQt5
      for i in $out/bin/*; do
        wrapProgram $i --prefix PYTHONPATH : "$PYTHONPATH"
      done
  
negative.code:   pname = "PyQt";
    version = "5.11.3";
  
    inherit (pythonPackages) buildPythonPackage python isPy3k dbus-python enum34;
  
    sip = pythonPackages.sip.override { sip-module = "PyQt5.sip"; };
  
  in buildPythonPackage {
    pname = pname;
  