anchor.diff:  , pythonOlder
   , qt5
   , xvfb-run
  +, proxy_tools
   }:
   
   buildPythonPackage rec {
     pname = "pywebview";
  -  version = "3.4";
  +  version = "3.5";
     disabled = pythonOlder "3.5";
   
     src = fetchFromGitHub {
       owner = "r0x0r";
       repo = "pywebview";
       rev = version;
  -    sha256 = "sha256-3JHwtw8oReolEl4k8cdt7GCVGNkfWWJN6EnZYHxzDO8=";
  +    sha256 = "sha256-+At/ToEylSPcLh/u2NHVTXQpMnw+2/afsevg5YAX/4c=";
     };
   
     nativeBuildInputs = [
  
positive.code:     popd
    '';
  
    meta = with lib; {
      homepage = "https://github.com/r0x0r/pywebview";
      description = "Lightweight cross-platform wrapper around a webview";
  
negative.code: 
    propagatedBuildInputs = [
      pyqtwebengine
      proxy_tools
    ] ++ lib.optionals (pythonOlder "3.7") [ importlib-resources ];
  
    checkInputs = [
  