anchor.diff:  let
     pythonEnv = python3.withPackages (ps: with ps; [ pyqt5_with_qtmultimedia ]);
   in mkDerivation {
  -  name = "qarte-4.12.0";
  +  pname = "qarte";
  +  version = "4.12.0";
  +
     src = fetchbzr {
       url = "http://bazaar.launchpad.net/~vincent-vandevyvre/qarte/qarte-4";
       rev = "56";
  
positive.code:       --prefix PATH : ${rtmpdump}/bin
    '';
  
    meta = {
      homepage = "https://launchpad.net/qarte";
      description = "A recorder for Arte TV Guide and Arte Concert";
      license = lib.licenses.gpl3;
      maintainers = with lib.maintainers; [ vbgl ];
      platforms = lib.platforms.linux;
    };
  }
  
negative.code: 
    installPhase = ''
      runHook preInstall
  
      mkdir -p $out/bin
      mv qarte $out/bin/
      substituteInPlace $out/bin/qarte \
  