/usr/bin/rake:17:Warning: require_gem is obsolete.  Use gem instead.
/usr/local/lib/site_ruby/1.8/rubygems.rb:301:in `report_activate_error': Could not find RubyGem rake (> 0) (Gem::LoadError)
        from /usr/local/lib/site_ruby/1.8/rubygems.rb:238:in `activate'
        from /usr/local/lib/site_ruby/1.8/rubygems.rb:76:in `active_gem_with_options'
        from /usr/local/lib/site_ruby/1.8/rubygems.rb:61:in `require_gem'
        from /usr/bin/rake:17