It seems we also need to pass DOCKER_BUILDKIT as an argument to docker
itself to get the full benefit of caching.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Suggested-by: Fabiano Rosas <farosas@suse.de>
---
tests/docker/Makefile.include | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index 54ed77f671..9401525325 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -39,7 +39,7 @@ docker-qemu-src: $(DOCKER_SRC_COPY)
# General rule for building docker images.
docker-image-%: $(DOCKER_FILES_DIR)/%.docker
$(call quiet-command, \
- $(RUNC) build \
+ DOCKER_BUILDKIT=1 $(RUNC) build \
$(if $V,,--quiet) \
$(if $(NOCACHE),--no-cache, \
$(if $(DOCKER_REGISTRY),--cache-from
$(DOCKER_REGISTRY)/qemu/$*)) \