diff --git a/Makefile b/Makefile
index 2a747c9..b9bcb84 100644
--- a/Makefile
+++ b/Makefile
@@ -4,8 +4,8 @@ all:
 install:
 	mv ./cowtool /sbin/cowtool
 	cp -r ./structure/* /etc/
-	mkdir /sources/
-	mkdir /sources/cowtool/
-	mkdir /sources/cowtool/buildspace/
+	mkdir -p /sources/
+	mkdir -p /sources/cowtool/
+	mkdir -p /sources/cowtool/buildspace/