Generate app $ rails -m http://gist.github.com/raw/338169/3a1d8e8eb1dde41479d2606019c0df031df7d872/rails23-bundler-template.rb foo $ cd foo Add a gem which provides generators to the Gemfile source :gemcutter gem 'rails', '2.3.5', :require => nil gem 'sqlite3-ruby' gem 'rspec-rails' Install $ bundle install --relock Try to use one of the generators $ script/generate rspec_model bar Couldn't find 'rspec_model' generator $ bundle exec script/generate rspec_model bar Couldn't find 'rspec_model' generator $ bundle exec bash $ script/generate rspec_model bar Couldn't find 'rspec_model' generator $ exit Install generator-providing gem at system level and try again $ sudo gem install rspec-rails $ script/generate rspec_model bar exists app/models/ create spec/models/ create spec/fixtures/ create app/models/bar.rb create spec/models/bar_spec.rb create spec/fixtures/bars.yml create db/migrate create db/migrate/20100319211452_create_bars.rb