anchor.diff:    prePatch = "rm -rf samples screenshots";
     patches = [ ./pipVTK.patch ./Compat.patch ];
   
  +  preConfigure = ''
  +    export PYTHONPATH=$PYTHONPATH:${vtk}/${python3.sitePackages}
  +  '';
  +
     propagatedBuildInputs = [
       numpy
       h5py
  
positive.code: { buildPythonApplication, fetchFromGitLab, lib
  , numpy, h5py, pyqt5, qtpy, future, vtk
  } :
  
  buildPythonApplication rec {
  
negative.code:     vtk
      future
    ];
  
    nativeBuildInputs = [ qt5.wrapQtAppsHook ];
  
    preFixup = ''
      wrapQtApp "$out/bin/pegamoid.py"
    '';
  
    meta = with lib; {
      description = "Python GUI for OpenMolcas";
  