anchor.diff:    propagatedBuildInputs = [
       defusedxml
       lxml
  +    packaging
       pillow
       setuptools
     ];
  
positive.code: , jbig2dec
  , lxml
  , mupdf
  , pillow
  , psutil
  , pybind11
  
negative.code: 
  buildPythonPackage rec {
    pname = "pikepdf";
    version = "4.3.0";
    disabled = ! isPy3k;
  
    src = fetchFromGitHub {
  