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-rw-r--r--tests/docker/Makefile.include2
1 files changed, 1 insertions, 1 deletions
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 $(DOCKER_REGISTRY)/qemu/$*)) \