deb_common config, box, extra: <<-SHELL
        # Install Jayatana so we can work around it being present.
        [ -f /usr/share/java/jayatanaag.jar ] || install jayatana
      SHELL
      ubuntu_docker config
    end
  end
  'ubuntu-1804'.tap do |box|
    config.vm.define box, define_opts do |config|
      config.vm.box = 'elastic/ubuntu-18.04-x86_64'
      deb_common config, box, extra: <<-SHELL