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  execute "install-jruby" do
    command %Q{
      curl http://dist.codehaus.org/jruby/jruby-src-1.1.6RC1.tar.gz -O &&
      tar xvzf jruby-src-1.1.6RC1.tar.gz &&
      pushd jruby-1.1.6RC1 &&
      ant &&
      popd &&
      mv jruby-1.1.6RC1 /usr/jruby &&
      rm jruby-src-1.1.6RC1.tar.gz
    }

    not_if { File.directory?('/usr/jruby') }
  end