“在cap deploy：找不到'capistrano'”

Question

我对此非常困惑。

darien:testr fschuindt$ cap deploy:setup
/Users/fschuindt/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/site_ruby/2.0.0/rubygems/dependency.rb:296:in `to_specs': Could not find 'capistrano' (>= 0) among 47 total gem(s) (Gem::LoadError)
    from /Users/fschuindt/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/site_ruby/2.0.0/rubygems/dependency.rb:307:in `to_spec'
    from /Users/fschuindt/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_gem.rb:47:in `gem'
    from /Users/fschuindt/.rvm/gems/ruby-2.0.0-p195/bin/cap:22:in `<main>'
    from /Users/fschuindt/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `eval'
    from /Users/fschuindt/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `<main>'

有人知道发生了什么事吗？ 这似乎是一个本地问题，但我在这里安装了Capistrano。