anchor.diff:  
   buildPythonPackage rec {
     pname = "adblock";
  -  version = "0.5.0";
  -  disabled = isPy27;
  +  version = "0.5.1";
  +  format = "pyproject";
  +
  +  disabled = pythonOlder "3.6";
   
     # Pypi only has binary releases
     src = fetchFromGitHub {
       owner = "ArniDagur";
       repo = "python-adblock";
       rev = version;
  -    sha256 = "sha256-JjmMfL24778T6LCuElXsD7cJxQ+RkqbNEnEqwoN24WE=";
  +    sha256 = "sha256-f6PmEHVahQv8t+WOkE8DO2emivHG2t14hUSIf/l8omY=";
     };
   
     cargoDeps = rustPlatform.fetchCargoTarball {
       inherit src;
       name = "${pname}-${version}";
  -    hash = "sha256-w+/W4T3ukRHNpCPjhlHZLPn6sgCpz4QHVD8VW+Rw5BI=";
  +    hash = "sha256-x0mcykHWhheD2ycELcfR1ZQ/6WfFQzY+L/LmMipP4Rc=";
     };
   
  -  format = "pyproject";
  +  nativeBuildInputs = [
  +    pkg-config
  +  ] ++ (with rustPlatform; [
  +    cargoSetupHook
  +    maturinBuildHook
  +  ]);
   
  -  nativeBuildInputs = [ pkg-config ]
  -    ++ (with rustPlatform; [ cargoSetupHook maturinBuildHook ]);
  -
  -  buildInputs = [ openssl ]
  -    ++ lib.optionals stdenv.isDarwin [ libiconv CoreFoundation Security ];
  +  buildInputs = [
  +    openssl
  +  ] ++ lib.optionals stdenv.isDarwin [
  +    libiconv
  +    CoreFoundation
  +    Security
  +  ];
   
     PSL_PATH = "${publicsuffix-list}/share/publicsuffix/public_suffix_list.dat";
   
  -  checkInputs = [ pytestCheckHook toml ];
  +  checkInputs = [
  +    pytestCheckHook
  +    toml
  +  ];
   
     preCheck = ''
       # import from $out instead
  
positive.code: { stdenv
  , lib
  , fetchFromGitHub
  , buildPythonPackage
  , rustPlatform
  , pkg-config
  , openssl
  , publicsuffix-list
  , isPy27
  , libiconv
  , CoreFoundation
  , Security
  
negative.code:     "tests/test_typestubs.py"
    ];
  
    pythonImportsCheck = [
      "adblock"
      "adblock.adblock"
    ];
  
    meta = with lib; {
      description = "Python wrapper for Brave's adblocking library";
      homepage = "https://github.com/ArniDagur/python-adblock/";
      maintainers = with maintainers; [ petabyteboy dotlambda ];
      license = with licenses; [ asl20 /* or */ mit ];
    };
  }
  