anchor.diff:  , buildPythonPackage
   , coloredlogs
   , fetchFromGitHub
  -, fetchpatch
   , ghostscript
   , img2pdf
   , importlib-metadata
  
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: 
  buildPythonPackage rec {
    pname = "ocrmypdf";
    version = "13.4.7";
  
    src = fetchFromGitHub {
      owner = "ocrmypdf";
  