diff --git a/board/czechlight/clearfog/mk-rauc-bundle.sh b/board/czechlight/clearfog/mk-rauc-bundle.sh
new file mode 100755
index 0000000..8d82432
--- /dev/null
+++ b/board/czechlight/clearfog/mk-rauc-bundle.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+RAUC_BUILD_DIR=${BUILD_DIR}/rauc-work-tmp
+RAUC_IMAGE=${BINARIES_DIR}/update.raucb
+ROOTFS_NAME=rootfs.tar.xz
+
+rm -rf ${RAUC_BUILD_DIR}
+mkdir ${RAUC_BUILD_DIR}
+rm -f ${RAUC_IMAGE}
+
+ln ${BINARIES_DIR}/${ROOTFS_NAME} ${RAUC_BUILD_DIR}/
+cat > ${RAUC_BUILD_DIR}/manifest.raucm << EOF
+[update]
+compatible=czechlight-clearfog
+version=dev
+
+[image.rootfs]
+filename=${ROOTFS_NAME}
+EOF
+
+rauc \
+  --cert ${BR2_EXTERNAL_CZECHLIGHT_PATH}/crypto/rauc-cert.pem \
+  --key ${BR2_EXTERNAL_CZECHLIGHT_PATH}/crypto/rauc-key.pem \
+  bundle ${RAUC_BUILD_DIR} ${RAUC_IMAGE}