anchor.diff:      mock
     ];
   
  +  disabledTests = [
  +    # block devices access
  +    "test_is_block_device"
  +  ];
  +
     disabledTestPaths = [
  -     # lots of DNS lookups
  +    # lots of DNS lookups
       "tests/test_sockets.py"
     ] ++ lib.optionals stdenv.isDarwin [
       # darwin sandboxing limitations
  
positive.code: 
  buildPythonPackage rec {
    pname = "anyio";
    version = "3.2.1";
    format = "pyproject";
    disabled = pythonOlder "3.7";
  
  
negative.code:     owner = "agronholm";
      repo = pname;
      rev = version;
      sha256 = "sha256-bMnAijFLXZSgTWsalT/J4sJ0Jrc1kFaQHJArwXnQFaQ=";
    };
  
    preBuild = ''
  