anchor.diff:      "test_defaults"
       "test_defaults_json"
       "test_latex_images"
  +
  +    # requires imagemagick (increases build closure size), doesn't
  +    # test anything substantial
  +    "test_ext_imgconverter"
     ];
   
     meta = with lib; {
  
positive.code: , sphinxcontrib-websupport
  # check phase
  , html5lib
  , imagemagick
  , pytestCheckHook
  , typed-ast
  }:
  
negative.code:   ];
  
    checkInputs = [
      html5lib
      pytestCheckHook
    ] ++ lib.optionals (pythonOlder "3.8") [
  