if [ -z "${def_bootlang}" ]; then
    def_bootlang="de_DE"
    def_keyboard="de"
    def_timezone="Europe/Berlin"
    def_netinstall="no"
    def_autostartdesktop="sway"
    def_copytoram="n"
fi
if [ -z "${bootlang}" ]; then
    bootlang="lang=${def_bootlang}"
    keyboard="keytable=${def_keyboard}"
    timezone="tz=${def_timezone}"
    installermode="netinstall=${def_netinstall}"
    desktop="autostartdesktop=${def_autostartdesktop}"
    disktoram="copytoram=${def_copytoram}"
fi