anchor.diff:      extraPostFetch = ''
         rm "$out/.git_archival.txt"
       '';
  -    sha256 = "sha256-8ForstZzRpr2TnOgK/+y4aF3R7XMEYfcSQhntA765Co=";
  +    hash = "sha256-9dSJ6+rZd49rFSQExYnFBGQGZ8MnFM+z/0Iz/nYkW4E=";
     };
   
     patches = [
  
positive.code: 
  buildPythonPackage rec {
    pname = "pikepdf";
    version = "4.2.0";
    disabled = ! isPy3k;
  
    src = fetchFromGitHub {
  
negative.code: , jbig2dec
  , lxml
  , mupdf
  , packaging
  , pillow
  , psutil
  , pybind11
  