These options can be configured using system properties in Properties and Environment Variables Build Parameters section.
Allows to specify which rake gem to use for launching rake build.
If your application doesn't use latest installed (in Ruby sdk) test-unit gem version please specify it here. Otherwise Test::Unit test reporter may try to load incorrect gem version and affect runtime behavior. If test-unit gem is installed but you application uses Test::Unit bundled in Ruby 1.8.x SDK please set version value to 'built-in'.
Launches bundler emulation for specified bundler gem version (the gem should be already installed on an agent.
Customizes Gemfile if it isn't located in checkout directory root.
Sets BUNDLE_PATH if TeamCity doesn't fetch it correctly from <Gemfile containing directory>/.bundle/config.