shoes error packaging app

gistfile1.txt

Packaging swt:app...
NameError: uninitialized constant Bundler
          const_missing at org/jruby/RubyModule.java:2726
                to_spec at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/warbler-1.4.8/lib/warbler/bundler_helper.rb:12
  find_single_gem_files at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/warbler-1.4.8/lib/warbler/gems.rb:58
                  specs at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/warbler-1.4.8/lib/warbler/gems.rb:46
                   each at org/jruby/RubyHash.java:1341
                    map at org/jruby/RubyEnumerable.java:763
                  specs at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/warbler-1.4.8/lib/warbler/gems.rb:46
        find_gems_files at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/warbler-1.4.8/lib/warbler/jar.rb:197
                  apply at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/warbler-1.4.8/lib/warbler/jar.rb:144
                package at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/furoshiki-0.3.1/lib/furoshiki/jar.rb:20
                  chdir at org/jruby/RubyDir.java:339
                package at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/furoshiki-0.3.1/lib/furoshiki/jar.rb:18
      ensure_jar_exists at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/furoshiki-0.3.1/lib/furoshiki/jar_app.rb:150
                package at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/furoshiki-0.3.1/lib/furoshiki/jar_app.rb:56
                    run at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/shoes-swt-4.0.0.pre4/lib/shoes/swt/packager.rb:29
                   each at org/jruby/RubyArray.java:1613
                    run at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/shoes-swt-4.0.0.pre4/lib/shoes/swt/packager.rb:25
                    run at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/shoes-core-4.0.0.pre4/lib/shoes/packager.rb:24
                    run at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/shoes-core-4.0.0.pre4/lib/shoes/ui/cli.rb:70
                 (root) at /home/konstantin/.rvm/gems/jruby-1.7.19/gems/shoes-swt-4.0.0.pre4/bin/shoes-swt:11
                   load at org/jruby/RubyKernel.java:1087
                 (root) at /home/konstantin/.rvm/gems/jruby-1.7.19/bin/shoes-swt:23