diff --git a/tools/alpine/Makefile b/tools/alpine/Makefile
index 5c5149262..51439a478 100644
--- a/tools/alpine/Makefile
+++ b/tools/alpine/Makefile
@@ -6,12 +6,14 @@ IMAGE=alpine
 DOCKER_CONTENT_VAR=1
 PKG_DEPS=packages
 
-ifeq ($(shell uname -m), x86_64)
+ARCH := $(shell uname -m)
+
+ifeq ($(ARCH), x86_64)
 BASE=alpine:3.6
 PKG_DEPS += packages.x86_64
 endif
 
-ifeq ($(shell uname -m), aarch64)
+ifeq ($(ARCH), aarch64)
 BASE=arm64v8/alpine:3.6
 PKG_DEPS += packages.aarch64
 DOCKER_CONTENT_VAR=0
@@ -20,27 +22,29 @@ endif
 default: push
 
 show-tag:
-	@sed -n -e '1s/# \(.*\/.*:[0-9a-f]\{40\}\)/\1/p;q' versions.$(shell uname -m)
+	@sed -n -e '1s/# \(.*\/.*:[0-9a-f]\{40\}\)/\1/p;q' versions.$(ARCH)
 
-hash: Dockerfile Makefile $(PKG_DEPS)
+iid: Dockerfile Makefile $(PKG_DEPS)
 	DOCKER_CONTENT_TRUST=$(DOCKER_CONTENT_VAR) docker pull $(BASE)
-	docker build --no-cache --build-arg BASE=$(BASE) -t $(IMAGE):build .
-	docker run --rm $(IMAGE):build sh -c 'echo Dockerfile /lib/apk/db/installed $$(find /mirror -name '*.apk' -type f) $$(find /go/bin -type f) | xargs cat | sha1sum' | sed 's/ .*//' > $@
+	docker build --no-cache --build-arg BASE=$(BASE) --iidfile iid .
 
-push: hash
+hash: Makefile iid
+	docker run --rm $(shell cat iid) sh -c 'echo Dockerfile /lib/apk/db/installed $$(find /mirror -name '*.apk' -type f) $$(find /go/bin -type f) | xargs cat | sha1sum' | sed 's/ .*//' > $@
+
+versions.$(ARCH): Makefile hash iid
+	echo "# $(ORG)/$(IMAGE):$(shell cat hash)" > versions.$(ARCH)
+	docker run --rm $(shell cat iid) find /mirror -name '*.apk' -exec basename '{}' .apk \; | sort | (echo '# automatically generated list of installed packages'; cat -) >> versions.$(ARCH)
+
+push: hash iid versions.$(ARCH)
 	DOCKER_CONTENT_TRUST=$(DOCKER_CONTENT_VAR) docker pull $(ORG)/$(IMAGE):$(shell cat hash) || \
-		(docker tag $(IMAGE):build $(ORG)/$(IMAGE):$(shell cat hash) && \
+		(docker tag $(shell cat iid) $(ORG)/$(IMAGE):$(shell cat hash) && \
 		 DOCKER_CONTENT_TRUST=$(DOCKER_CONTENT_VAR) docker push $(ORG)/$(IMAGE):$(shell cat hash))
-	echo "# $(ORG)/$(IMAGE):$(shell cat hash)" > versions.$(shell uname -m)
-	docker run --rm $(IMAGE):build find /mirror -name '*.apk' -exec basename '{}' .apk \; | sort | (echo '# automatically generated list of installed packages'; cat -) >> versions.$(shell uname -m)
-	docker rmi $(IMAGE):build
-	rm -f hash
+	rm -f iid
 
-tag: hash
+tag: hash iid versions.$(ARCH)
 	docker pull $(ORG)/$(IMAGE):$(shell cat hash) || \
-		docker tag $(IMAGE):build $(ORG)/$(IMAGE):$(shell cat hash)
-	docker rmi $(IMAGE):build
-	rm -f hash
+		docker tag $(shell cat iid) $(ORG)/$(IMAGE):$(shell cat hash)
+	rm -f iid
 
 clean:
-	rm -f hash
+	rm -f hash iid