# File lib/phusion_passenger/standalone/runtime_installer.rb, line 165
        def before_install
                super
                @plugin.call_hook(:runtime_installer_start, self) if @plugin
                @working_dir = Dir.mktmpdir("passenger.")
                @download_binaries = true if !defined?(@download_binaries)
                @binaries_url_root ||= STANDALONE_BINARIES_URL_ROOT
        end