# assume sane defaults (if not set already) {{{
[ -n "$ARCH" ] || ARCH="$(dpkg --print-architecture)"
[ -n "$BOOT_METHOD" ] || BOOT_METHOD='isolinux'
-[ -n "$CLASSES" ] || CLASSES="GRMLBASE,GRML_MEDIUM,I386"
+[ -n "$CLASSES" ] || CLASSES="GRMLBASE,GRML_MEDIUM,$(echo ${ARCH} | tr 'a-z' 'A-Z')"
[ -n "$DATE" ] || DATE="$(date +%Y-%m-%d)"
[ -n "$DISTRI_INFO" ] || DISTRI_INFO='Grml - Live Linux for system administrators '
[ -n "$DISTRI_NAME" ] || DISTRI_NAME="grml"