diff --git a/Makefile b/Makefile
index 753a082..0ea3132 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,20 @@
 # Known configs:
 # * airgap
 
-.PHONY: default
-default: out/archlinux-baseline-arch-airgap-x86_64.iso
+CONFIG ?= airgap
 
-out/archlinux-baseline-arch-%-x86_64.iso: configs/%
+.PHONY: default
+default: out/archlinux-baseline-arch-$(CONFIG)-x86_64.iso
+
+.PHONY: vars
+vars:
+	@echo "CONFIG ?= $(CONFIG)"
+
+.PHONY: clean
+clean:
+	rm -rf out work || true
+
+out/archlinux-baseline-arch-%-x86_64.iso: configs/%/
 	$(MAKE) docker-airgap-builder
 	mkdir -p out
 	docker run --rm --privileged --volume "$(PWD)/out:/out" airgap-builder $<