1 files changed, 7 insertions, 2 deletions
diff --git a/rules/Makefile b/rules/Makefile
index da130831..f5fa401e 100644
--- a/rules/Makefile
+++ b/rules/Makefile
@@ -1,6 +1,11 @@
-.PHONY: all
+.PHONY: all clean
 
-all: rules.html maps.html
+HTML = rules.html maps.html
+
+all: $(HTML)
 
 %.html: %.md Makefile
 	pandoc --toc $*.md -s -o $@
+
+clean:
+	rm $(HTML)