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我试图在我的运行os x 10.10的mac上设置ruby on rails.我试图让服务器运行开源项目kandan但是当我尝试在eventmachine 1.0.3 gem上捆绑安装时遇到错误.我不确定我到底在看什么,有人可以帮我解决这个问题吗？

bundle install
Fetching gem metadata from https://rubygems.org/.............
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Using rake 10.4.2
Using i18n 0.6.11
Using multi_json 1.10.1
Using activesupport 3.2.21
Using builder 3.0.4
Using activemodel 3.2.21
Using erubis 2.7.0
Using journey 1.0.4
Using rack 1.4.5
Using rack-cache 1.2
Using rack-test 0.6.2
Using hike 1.2.3
Using tilt 1.4.1
Using sprockets 2.2.3
Using actionpack 3.2.21
Using mime-types 1.25.1
Using polyglot 0.3.5
Using treetop 1.4.15
Using mail …