diff --git a/src/liblily/Makefile b/src/liblily/Makefile
index c42d082..428ee29 100644
--- a/src/liblily/Makefile
+++ b/src/liblily/Makefile
@@ -1,3 +1,5 @@
+.PHONY: clean
+
 build/liblily.a: build build/lily.o
 	ar rcs build/liblily.a build/lily.o
 
@@ -6,3 +8,6 @@ build/lily.o: build lily.c lily.h
 
 build:
 	mkdir build
+
+clean:
+	rm -rf build/