-if [ -f "${ISO_OUTPUT}/${ISO_NAME}" -a -z "$UPDATE" -a -z "$BUILD_ONLY" -a -z "$BUILD_DIRTY" ] ; then
- log "$ISO_OUTPUT exists already, skipping stage 'iso build'"
- ewarn "$ISO_OUTPUT exists already, skipping stage 'iso build'" ; eend 0
+if [ -f "${ISO_OUTPUT}/${ISO_NAME}" -a -z "$UPDATE" -a -z "$BUILD_ONLY" -a -z "$BUILD_DIRTY" -a "$FORCE_ISO_REBUILD" = "false" ] ; then
+ log "$ISO_OUTPUT/${ISO_NAME} exists already, skipping stage 'iso build'"
+ ewarn "$ISO_OUTPUT/${ISO_NAME} exists already, skipping stage 'iso build'" ; eend 0