Gem.sources.each { |uri| source uri } sibling = "#{File.dirname(__FILE__)}/.." gem "activesupport", "3.0.pre", :vendored_at => "#{sibling}/activesupport" gem "activemodel", "3.0.pre", :vendored_at => "#{sibling}/activemodel" gem "arel", :git => "git://github.com/rails/arel.git", :branch => 'master' only :test do gem "mocha" end