diff --git a/package/swupdate/swupdate.mk b/package/swupdate/swupdate.mk
index 78f23ec239..91e0c9724c 100644
--- a/package/swupdate/swupdate.mk
+++ b/package/swupdate/swupdate.mk
@@ -106,25 +106,18 @@ define SWUPDATE_PREFER_STATIC
 endef
 endif
 
-define SWUPDATE_SET_BUILD_OPTIONS
-	$(call KCONFIG_SET_OPT,CONFIG_CROSS_COMPILE,"$(TARGET_CROSS)", \
-		$(SWUPDATE_BUILD_CONFIG))
-	$(call KCONFIG_SET_OPT,CONFIG_SYSROOT,"$(STAGING_DIR)", \
-		$(SWUPDATE_BUILD_CONFIG))
-	$(call KCONFIG_SET_OPT,CONFIG_EXTRA_CFLAGS,"$(TARGET_CFLAGS)", \
-		$(SWUPDATE_BUILD_CONFIG))
-	$(call KCONFIG_SET_OPT,CONFIG_EXTRA_LDFLAGS,"$(TARGET_LDFLAGS)", \
-		$(SWUPDATE_BUILD_CONFIG))
-endef
+SWUPDATE_MAKE_OPTS = \
+	CROSS_COMPILE="$(TARGET_CROSS)" \
+	CONFIG_EXTRA_CFLAGS="$(TARGET_CFLAGS)" \
+	CONFIG_EXTRA_LDFLAGS="$(TARGET_LDFLAGS)"
 
 define SWUPDATE_KCONFIG_FIXUP_CMDS
 	$(SWUPDATE_PREFER_STATIC)
-	$(SWUPDATE_SET_BUILD_OPTIONS)
 	$(SWUPDATE_SET_LUA_VERSION)
 endef
 
 define SWUPDATE_BUILD_CMDS
-	$(TARGET_MAKE_ENV) $(SWUPDATE_MAKE_ENV) $(MAKE) -C $(@D)
+	$(TARGET_MAKE_ENV) $(SWUPDATE_MAKE_ENV) $(MAKE) $(SWUPDATE_MAKE_OPTS) -C $(@D)
 endef
 
 define SWUPDATE_INSTALL_TARGET_CMDS