diff --git a/Makefile b/Makefile
index 08a0933..95aada8 100644
--- a/Makefile
+++ b/Makefile
@@ -24,8 +24,11 @@ $(TARBALL):
 size: $(TARBALL)
 	guix size $$(guix pack -RR -S /bin=bin -S /etc/ssl=etc/ssl -m $(GUIX_MANIFEST))
 
+.PHONY: pre-build
+pre-build: $(TARBALL) $(LINKS_TARBALL) $(PASSWD_FILE)
+
 .PHONY: build
-build: $(TARBALL) $(LINKS_TARBALL) $(PASSWD_FILE)
+build: pre-build
 	@docker build -t $(IMAGE_TAG) .
 
 .PHONY: run