anchor.diff:  { lib, buildPythonApplication, fetchPypi, pytest, chardet }:
  +
   buildPythonApplication rec {
     pname = "codespell";
     version = "2.0.0";
  
positive.code:     sha256 = "dd9983e096b9f7ba89dd2d2466d1fc37231d060f19066331b9571341363c77b8";
    };
  
    checkInputs = [ pytest chardet ];
    checkPhase = ''
      # We don't want to be affected by the presence of these
  
negative.code:     # test_command assumes too much about the execution environment
      pytest --pyargs codespell_lib.tests -k "not test_command"
    '';
  
    pythonImportsCheck = [ "codespell_lib" ];
  
    meta = {
      description = "Fix common misspellings in source code";
  