anchor.diff:  { stdenv, fetchFromGitHub, lib
  -, wrapGAppsHook, intltool, qpdf
  +, wrapGAppsHook, intltool
   , python3Packages, gtk3, poppler_gi
   }:
   
  
positive.code: 
    buildInputs = [
      gtk3 poppler_gi
      qpdf
    ];
  
    propagatedBuildInputs = with python3Packages; [
  
negative.code: 
    # incompatible with wrapGAppsHook
    strictDeps = false;
    dontWrapGApps = true;
    preFixup = ''
      makeWrapperArgs+=("''${gappsWrapperArgs[@]}")
    '';
  
    doCheck = false; # no tests
  
  