    # File lib/phusion_passenger/standalone/runtime_installer.rb, line 164
            def before_install
                    super
                    @plugin.call_hook(:runtime_installer_start, self) if @plugin
                    @working_dir = "/tmp/#{myself}-passenger-standalone-#{Process.pid}"
                    FileUtils.rm_rf(@working_dir)
                    FileUtils.mkdir_p(@working_dir)
                    @download_binaries = true if !defined?(@download_binaries)
                    @binaries_url_root ||= STANDALONE_BINARIES_URL_ROOT
            end