└% rails generate
/var/lib/gems/1.8/gems/uglifier-1.1.0/lib/uglifier.rb:3:in `require': no such file to load -- execjs (LoadError)
        from /var/lib/gems/1.8/gems/uglifier-1.1.0/lib/uglifier.rb:3
        from /var/lib/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
        from /var/lib/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
        from /var/lib/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `each'
        from /var/lib/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `require'
        from /var/lib/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `each'
        from /var/lib/gems/1.8/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `require'
        from /var/lib/gems/1.8/gems/bundler-1.0.21/lib/bundler.rb:122:in `require'
        from /var/www/testing/config/application.rb:7
        from /var/lib/gems/1.8/gems/railties-3.1.3/lib/rails/commands.rb:21:in `require'
        from /var/lib/gems/1.8/gems/railties-3.1.3/lib/rails/commands.rb:21
        from script/rails:6:in `require'
        from script/rails:6