static bool initialized;
static const struct udev_builtin *builtins[] = {
+#ifdef HAVE_BLKID
[UDEV_BUILTIN_BLKID] = &udev_builtin_blkid,
+#endif
[UDEV_BUILTIN_BTRFS] = &udev_builtin_btrfs,
[UDEV_BUILTIN_FIRMWARE] = &udev_builtin_firmware,
[UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,