diff --git a/export-noobs/prerun.sh b/export-noobs/prerun.sh
index 60d51a9..cab3979 100755
--- a/export-noobs/prerun.sh
+++ b/export-noobs/prerun.sh
@@ -19,7 +19,7 @@ mkdir -p ${NOOBS_DIR}
 mount $ROOT_DEV ${STAGE_WORK_DIR}/rootfs
 mount $BOOT_DEV ${STAGE_WORK_DIR}/rootfs/boot
 
-bsdtar --use-compress-program pxz -C ${STAGE_WORK_DIR}/rootfs/boot -cpf ${NOOBS_DIR}/boot.tar.xz .
-bsdtar --use-compress-program pxz -C ${STAGE_WORK_DIR}/rootfs --one-file-system -cpf ${NOOBS_DIR}/root.tar.xz .
+bsdtar --format gnutar --use-compress-program pxz -C ${STAGE_WORK_DIR}/rootfs/boot -cpf ${NOOBS_DIR}/boot.tar.xz .
+bsdtar --format gnutar --use-compress-program pxz -C ${STAGE_WORK_DIR}/rootfs --one-file-system -cpf ${NOOBS_DIR}/root.tar.xz .
 
 unmount_image ${IMG_FILE}