anchor.diff:      owner = pname;
       repo = pname;
       rev = version;
  -    sha256 = "1hl4rw8j5yiak0d34vx1l1blr8125bscjd8m46a5m8xzm98csjc7";
  +    sha256 = "sha256-mMFQp8GMjKUc3yyB4c8Tgxut7LkMFa2cySO3iSA/aI4=";
     };
   
     nativeBuildInputs = [
  
positive.code:     pytest-xdist
      pytestCheckHook
    ];
  
    patches = [
      # Switch to poetry-core, https://github.com/pyppeteer/pyppeteer/pull/262
      (fetchpatch {
        name = "switch-poetry-core.patch";
        url = "https://github.com/pyppeteer/pyppeteer/commit/e248baebefcf262fd96f261d940e74ed49ba2df9.patch";
        sha256 = "03g8n35kn2alqki37s0hf2231fk2zkr4nr1x1g2rfrhps9d6fyvw";
      })
    ];
  
    postPatch = ''
      # https://github.com/pyppeteer/pyppeteer/pull/252
      substituteInPlace pyproject.toml \
        --replace 'websockets = "^8.1"' 'websockets = "*"'
    '';
  
    disabledTestPaths = [
      # Requires network access
  
negative.code: 
  buildPythonPackage rec {
    pname = "pyppeteer";
    version = "0.2.6";
    disabled = pythonOlder "3.6";
    format = "pyproject";
  
  