我无法在运行Mountain Lion的Mac上安装Nokogiri。gem install nokogiri -v '1.6.0'Building native extensions. This could take a while...
/usr/local/Cellar/ruby193/1.9.3-p448/lib/ruby/1.9.1/rubygems/ext/builder.rb:48: warning: Insecure world writable dir /usr/local/bin in PATH, mode