anchor.diff:        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 \
  +      ${python.executable} setup.py nosetests -A 'not slow and not network' --stop \
           -e '${concatStringsSep "|" testsToSkip}' --verbosity=3
   
         runHook postCheck
  
positive.code:     buildInputs = with self; [ nose ] ++ optional isDarwin pkgs.libcxx;
      propagatedBuildInputs = with self; [
        dateutil
        numpy
        scipy
        numexpr
        pytz
        xlrd
        bottleneck
        sqlalchemy
        lxml
        # 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.locale; # provides the locale command
  
negative.code:     };
    };
  
    pandas_17 = let
      inherit (pkgs.stdenv.lib) optional optionalString;
      inherit (pkgs.stdenv) isDarwin;
    in buildPythonPackage rec {
  