Makefile: enable buildkit when building images

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 863ec11)


Signed-off-by: Guillaume Lours <guillaume.lours@docker.com>
Upstream-commit: 6d5aec99797342611f295aa06b343cc47fad781b
Component: packaging

Author: thaJeztah

components/packaging/deb/Makefile

@@ -16,7 +16,8 @@ ifdef BUILD_IMAGE
 endif
 
 COMMON_FILES=common
-BUILD?=docker build \
+BUILD?=DOCKER_BUILDKIT=1 \
+	docker build \
 	$(BUILD_IMAGE_FLAG) \
 	--build-arg GO_IMAGE=$(GO_IMAGE) \
 	--build-arg COMMON_FILES=$(COMMON_FILES) \

components/packaging/rpm/Makefile

@@ -17,7 +17,8 @@ endif
 ifdef BUILD_IMAGE
 	BUILD_IMAGE_FLAG=--build-arg $(BUILD_IMAGE)
 endif
-BUILD?=docker build \
+BUILD?=DOCKER_BUILDKIT=1 \
+	docker build \
 	$(BUILD_IMAGE_FLAG) \
 	--build-arg GO_IMAGE=$(GO_IMAGE) \
 	-t rpmbuild-$@/$(ARCH) \