Makefile: Fix broken build for manifest

Fix broken build when LINUXKIT_PKG_TARGET=manifest.

Signed-off-by: Renê de Souza Pinto <rene@renesp.com.br>

Makefile

@@ -1034,8 +1034,8 @@ eve-%: pkg/%/Dockerfile build-tools $(BUILDARGS_FILE) $(RESCAN_DEPS)
 	$(eval LINUXKIT_DOCKER_LOAD := $(if $(filter $(PKGS_DOCKER_LOAD),$*),--docker,))
 	$(eval LINUXKIT_BUILD_PLATFORMS_LIST := $(call uniq,linux/$(ZARCH) $(if $(filter $(PKGS_HOSTARCH),$*),linux/$(HOSTARCH),)))
 	$(eval LINUXKIT_BUILD_PLATFORMS := --platforms $(subst $(space),$(comma),$(strip $(LINUXKIT_BUILD_PLATFORMS_LIST))))
-	$(eval LINUXKIT_FLAGS := $(if $(filter manifest,$(LINUXKIT_PKG_TARGET)),,$(FORCE_BUILD) $(LINUXKIT_DOCKER_LOAD) $(LINUXKIT_BUILD_PLATFORMS)))
-	$(QUIET)$(LINUXKIT) $(DASH_V) pkg $(LINUXKIT_PKG_TARGET) $(LINUXKIT_BUILD_ARGS) $(LINUXKIT_OPTS) $(LINUXKIT_FLAGS) --build-yml $(call get_pkg_build_yml,$*) pkg/$*
+	$(eval LINUXKIT_FLAGS := $(if $(filter manifest,$(LINUXKIT_PKG_TARGET)),,$(FORCE_BUILD) $(LINUXKIT_BUILD_ARGS) $(LINUXKIT_DOCKER_LOAD) $(LINUXKIT_BUILD_PLATFORMS)))
+	$(QUIET)$(LINUXKIT) $(DASH_V) pkg $(LINUXKIT_PKG_TARGET) $(LINUXKIT_OPTS) $(LINUXKIT_FLAGS) --build-yml $(call get_pkg_build_yml,$*) pkg/$*
 	$(QUIET)if [ -n "$(PRUNE)" ]; then \
 		$(LINUXKIT) pkg builder prune; \
 		docker image prune -f; \