diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8168e73
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+all: top.stl lid.stl bottom.stl
+
+%.stl: %.scad constants.scad cap.scad
+	openscad -o $@ $<