diff --git a/Makefile b/Makefile
index 83f96e4..d9caa7d 100644
--- a/Makefile
+++ b/Makefile
@@ -278,16 +278,12 @@ manylinux1-x86.test: manylinux1-x86
 base: Dockerfile imagefiles/
 	$(DOCKER) build -t $(ORG)/base:latest \
 		--build-arg IMAGE=$(ORG)/base \
-		--build-arg VCS_REF=`git rev-parse --short HEAD` \
 		--build-arg VCS_URL=`git config --get remote.origin.url` \
-		--build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
 		.
 	$(DOCKER) build -t $(ORG)/base:$(TAG) \
 		--build-arg IMAGE=$(ORG)/base \
 		--build-arg VERSION=$(TAG) \
-		--build-arg VCS_REF=`git rev-parse --short HEAD` \
 		--build-arg VCS_URL=`git config --get remote.origin.url` \
-		--build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
 		.
 
 base.test: base