+Build/Exports:=$(Host/Exports)
+
+define Build/Configure
+ # enable additional options beyond clearfog_defconfig
+ echo CONFIG_NET_RANDOM_ETHADDR=y >> $(PKG_BUILD_DIR)/configs/$(BUILD_VARIANT)_defconfig
+ echo CONFIG_CMD_SETEXPR=y >> $(PKG_BUILD_DIR)/configs/$(BUILD_VARIANT)_defconfig
+
+ +$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR) $(UBOOT_CONFIGURE_VARS) $(UBOOT_CONFIG)_config
+endef
+