anchor.diff:      install -m 644 -D extras/scrapy_zsh_completion $out/share/zsh/site-functions/_scrapy
     '';
   
  +  __darwinAllowLocalNetworking = true;
  +
     meta = with lib; {
       description = "A fast high-level web crawling and web scraping framework, used to crawl websites and extract structured data from their pages";
       homepage = "https://scrapy.org/";
  
positive.code: { lib, stdenv
  , buildPythonPackage
  , isPy27
  , fetchPypi
  
negative.code:     "test_retry_dns_error"
      "test_custom_asyncio_loop_enabled_true"
      "test_custom_loop_asyncio"
    ] ++ stdenv.lib.optionals stdenv.isDarwin [
      "test_xmliter_encoding"
      "test_download"
    ];
  
    src = fetchPypi {
      inherit pname version;
  