Missing files with rails generate cucumber:install

when ranning cucumber:install

and generate me this files <code> create config/cucumber.yml create script/cucumber chmod script/cucumber create features/step_definitions create features/support create features/support/env.rb exist lib/tasks create lib/tasks/cucumber.rake gsub config/database.yml gsub config/database.yml force config/database.yml </code> im searching for the path.rb inside support it didnt generate me one my cucumber version is

cucumber (1.1.4) cucumber-rails (1.2.1) ruby version 1.9.2 rails 3.1.1

reading this solve my problem https://github.com/cucumber/cucumber-rails/blob/f027440965b96b780e84e50dd47203a2838e8d7d/History.md