diff --git a/Makefile b/Makefile
index 18b4116..8532c8e 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@ image:
 rebuild:
 	-$(FUMOUNT) $(BUILD)/filesystem/ || true
 	-$(FUMOUNT) /tmp/redox_installer/ || true
-	rm -rf $(BUILD)
+	rm -rf $(BUILD)/repo.tag $(BUILD)/harddrive.img $(BUILD)/livedisk.iso
 	$(MAKE) all
 
 clean: $(CONTAINER_TAG)
diff --git a/mk/repo.mk b/mk/repo.mk
index 0291c68..3f6753d 100644
--- a/mk/repo.mk
+++ b/mk/repo.mk
@@ -20,8 +20,9 @@ else
 	cd cookbook && \
 	./repo.sh $(REPO_NONSTOP) "$${PACKAGES}"
 	mkdir -p $(BUILD)
-	# make sure fetch.tag is newer than the things repo modifies
-	touch $<
+	# make sure fstools.tag and fetch.tag are newer than the things repo modifies
+	touch $(FSTOOLS_TAG)
+	touch $(BUILD)/fetch.tag
 	touch $@
 endif