anchor.diff:        bottleneck
         sqlalchemy9
         lxml
  -      html5lib
  +      # Disabling this because an upstream dependency, pep8, is broken on v3.5.
  +      (if isPy35 then null else html5lib)
         modules.sqlite3
         beautifulsoup4
       ] ++ optional isDarwin pkgs.darwin.adv_cmds; # provides the locale command
  
positive.code:     # The `-e` flag disables a few problematic tests.
      # https://github.com/pydata/pandas/issues/11169
      # https://github.com/pydata/pandas/issues/11287
      checkPhase = ''
        runHook preCheck
        # The flag `-A 'not network'` will disable tests that use internet.
        # The `-e` flag disables a few problematic tests.
        ${python.executable} setup.py nosetests -A 'not network' --stop \
          -e 'test_data|test_excel|test_html|test_json|test_frequencies|test_frame|test_read_clipboard_infer_excel' --verbosity=3
  
        runHook postCheck
      '';
  
negative.code:   cycler = buildPythonPackage rec {
      name = "cycler-${version}";
      version = "0.9.0";
  
      src = pkgs.fetchurl {
        url = "https://pypi.python.org/packages/source/C/Cycler/${name}.tar.gz";
        sha256 = "96dc4ddf27ef62c09990c6196ac1167685e89168042ec0ae4db586de023355bc";
  