anchor.diff:  , uvloop
   }:
   
  -
   buildPythonPackage rec {
     pname = "black";
     version = "22.8.0";
  
positive.code:   doCheck = !(stdenv.isLinux && stdenv.isAarch64);
  
    propagatedBuildInputs = [
      aiohttp
      aiohttp-cors
      click
      colorama
      mypy-extensions
      pathspec
      platformdirs
      tomli
      uvloop
    ] ++ lib.optional (pythonOlder "3.8") typed-ast
    ++ lib.optional (pythonOlder "3.10") typing-extensions;
  
    meta = with lib; {
      description = "The uncompromising Python code formatter";
  
negative.code:   # Black starts a local server and needs to bind a local address.
    __darwinAllowLocalNetworking = true;
  
    checkInputs = [ pytestCheckHook parameterized aiohttp ];
  
    preCheck = ''
      export PATH="$PATH:$out/bin"
  