diff --git a/themes/Makefile b/themes/Makefile
new file mode 100644
index 000000000..b9298207c
--- /dev/null
+++ b/themes/Makefile
@@ -0,0 +1,9 @@
+.PHONY: clean
+
+ALL: compact.css compact_night.css light.css night_blue.css night.css
+
+%.css: %.less light/*.less
+	lessc --source-map=$(patsubst %.less,%.css.map,${<}) ${<} ${@}
+
+clean:
+	rm -f *.css *.css.map