anchor.diff:  
   buildPythonPackage rec {
     pname = "karton-classifier";
  -  version = "1.2.0";
  +  version = "1.4.0";
  +  format = "setuptools";
   
     disabled = pythonOlder "3.7";
   
  
positive.code:     python-magic
    ];
  
    postPatch = ''
      substituteInPlace requirements.txt \
        --replace "chardet==3.0.4" "chardet" \
        --replace "python-magic==0.4.18" "python-magic"
    '';
  
    checkInputs = [
      pytestCheckHook
    ];
  
    pythonImportsCheck = [ "karton.classifier" ];
  
    meta = with lib; {
      description = "File type classifier for the Karton framework";
  
negative.code:     owner = "CERT-Polska";
      repo = pname;
      rev = "v${version}";
      hash = "sha256-TRmAin0TAOIwR5EBMwTOJ9QaHO+mOx/eAjgqvyQZDj4=";
    };
  
    propagatedBuildInputs = [
  