anchor.diff:  , isPy3k
   , lxml
   , pillow
  +, psutil
   , pybind11
  -, pytestCheckHook
  +, pytest-cov
   , pytest-helpers-namespace
   , pytest-timeout
  -, pytest_xdist
  -, pytestrunner
  +, pytest-xdist
  +, pytestCheckHook
   , python-dateutil
   , python-xmp-toolkit
  -, python3
   , qpdf
  +, setuptools-scm
   , setuptools-scm-git-archive
  -, setuptools_scm
  -, lib
   }:
   
   buildPythonPackage rec {
     pname = "pikepdf";
  -  version = "2.2.0";
  +  version = "2.5.2";
     disabled = ! isPy3k;
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "74300a32c41b3d578772f6933f23a88b19f74484185e71e5225ce2f7ea5aea78";
  +    sha256 = "sha256-j8PpeyTa+9SxrAV8jxRMGEZ85V00KhqMQmiIkOrVjvM=";
     };
   
     buildInputs = [
  
positive.code: { attrs
  , buildPythonPackage
  , defusedxml
  , fetchPypi
  
negative.code: 
    nativeBuildInputs = [
      setuptools-scm-git-archive
      setuptools-scm
    ];
  
    checkInputs = [
      attrs
      hypothesis
      pytest-helpers-namespace
      pytest-timeout
      pytest-xdist
      psutil
      pytest-cov
      pytestCheckHook
      python-dateutil
      python-xmp-toolkit
    ];
  
    propagatedBuildInputs = [
      defusedxml
      lxml
      pillow
    ];
  
    preBuild = ''
      HOME=$TMPDIR
    '';
  
    pythonImportsCheck = [ "pikepdf" ];
  
    meta = with lib; {
      homepage = "https://github.com/pikepdf/pikepdf";
  