Rails 4.0新应用程序生成gem错误

Question

• Mac OS X 10.9 Mavericks（Beta2）
• Ruby 2.0.0p195
• Rails 4.0.0

使用自制软件来安装rbenv和ruby-build。在我的用户文件夹的2.0.0p195文件夹中安装了Ruby ~/.rbenv/versions。设置为使用此版本（非系统红宝石）

当我运行rails new APPNAME时，我收到此错误

Enter your password to install the bundled RubyGems to your system: 
Fetching gem metadata from https://rubygems.org/..........
Fetching gem metadata from https://rubygems.org/..
Resolving dependencies...
Using rake (10.1.0) 
Using i18n (0.6.4) 
Using minitest (4.7.5) 
Using multi_json (1.7.7) 
Installing atomic (1.1.10) 
Errno::EACCES: Permission denied - /Library/Ruby/Gems/2.0.0/build_info/atomic-       1.1.10.info
An error occurred while installing atomic (1.1.10), and Bundler cannot continue.
Make sure that `gem install atomic -v '1.1.10'` succeeds before bundling.

有关如何解决此问题的任何建议？ gem版本为2.0.3。