anchor.diff:  
     src = python3.pkgs.fetchPypi {
       inherit pname version;
  -    sha256 = "22ec361f9a4c86abefbfab541f588597e21bf4fbedf2911f230e560b2ec3503a";
  +    sha256 = "70f39b373ead42acb8caf56040f7ebf13ab67aea505511025c09ecf4560f8b1b";
     };
  -
  -  patches = [
  -    # https://github.com/jgosmann/dmarc-metrics-exporter/pull/23
  -    (fetchpatch {
  -      url = "https://github.com/jgosmann/dmarc-metrics-exporter/commit/3fe401f5dfb9e0304601a2a89ac987ff853b7cba.patch";
  -      hash = "sha256-MjVLlFQMp2r3AhBMu1lEmRm0Y2H9FdvCfPgAK5kvwWE=";
  -    })
  -  ];
   
     postPatch = ''
       substituteInPlace pyproject.toml \
  -      --replace 'python = "^3.7,<3.10"' 'python = "^3.7,<3.11"' \
  -      --replace poetry.masonry.api poetry.core.masonry.api \
         --replace '"^' '">='
     '';
   
  
positive.code: { lib
  , python3
  , fetchpatch
  }:
  
  python3.pkgs.buildPythonApplication rec {
    pname = "dmarc-metrics-exporter";
    version = "0.5.1";
  
    disabled = python3.pythonOlder "3.7";
  
  
negative.code:   meta = {
      description = "Export Prometheus metrics from DMARC reports";
      homepage = "https://github.com/jgosmann/dmarc-metrics-exporter";
      changelog = "https://github.com/jgosmann/dmarc-metrics-exporter/blob/v${version}/CHANGELOG.rst";
      license = lib.licenses.mit;
      maintainers = with lib.maintainers; [ ma27 ];
    };
  