anchor.diff:  
   buildPythonPackage rec {
     pname = "ocrmypdf";
  -  version = "13.4.6";
  +  version = "13.4.7";
   
     src = fetchFromGitHub {
       owner = "ocrmypdf";
  
positive.code:       pngquant = "${lib.getBin pngquant}/bin/pngquant";
        tesseract = "${lib.getBin tesseract4}/bin/tesseract";
        unpaper = "${lib.getBin unpaper}/bin/unpaper";
      })
      # https://github.com/ocrmypdf/OCRmyPDF/pull/973
      (fetchpatch {
        url = "https://github.com/ocrmypdf/OCRmyPDF/commit/808b24d59f5b541a335006aa6ea7cdc3c991adc0.patch";
        hash = "sha256-khsH70fWk5fStf94wcRKKX7cCbgD69LtKkngJIqA3+w=";
      })
    ];
  
  
negative.code:     postFetch = ''
        rm "$out/.git_archival.txt"
      '';
      hash = "sha256-jCfMCjh8MdH5K76iyJCgtkgPtpxnCxlXlzttTIzINPk=";
    };
  
    SETUPTOOLS_SCM_PRETEND_VERSION = version;
  