捆绑安装后，Rails为什么找不到我的宝石？

Question

我有一个Rails应用程序。 当我运行bundle install我会看到所有gems都已安装，并且在所有操作的结尾都看到此消息。

Bundle complete! 71 Gemfile dependencies, 180 gems now installed.

但是，当我执行rails s 。 我收到此消息：

Ignoring nokogiri-1.6.8 because its extensions are not built.  Try: gem pristine nokogiri-1.6.8
Ignoring json-1.8.3 because its extensions are not built.  Try: gem pristine json-1.8.3
Ignoring binding_of_caller-0.7.2 because its extensions are not built.  Try: gem pristine binding_of_caller-0.7.2
Ignoring bluecloth-2.2.0 because its extensions are not built.  Try: gem pristine bluecloth-2.2.0
Could not find libv8-3.16.14.15 in any of the sources
Run `bundle install` to install missing gems.

为什么会这样？ 我已经运行过bundle install ，然后当我使用bundle show json我得到了/Users/drubio/.rvm/gems/ruby-2.2.5@ohloh-ui/gems/json-1.8.3

所有其他宝石也是如此。 这里有什么问题？