diff --git a/build/Makefile b/build/Makefile
index 7b23f41..c761596 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -122,6 +122,7 @@ root usr protofs : $(ALLSRCS) init.0405 sh.0405
 	@cp $(KSRCS) usr/sys
 	@cp init.0405 root/etc/init
 	@cp sh.0405 root/bin/sh
+	@mkdir -p root/usr
 	@touch protofs
 
 # build filesystem images
@@ -143,8 +144,9 @@ tape : protofs
 
 install : rf0.dsk rk0.dsk
 	@echo Installing...
+	@mkdir -p ../images
 	@cp rf0.dsk rk0.dsk ../boot/m792low.load ../images
-	
+
 # clean intermediate files
 clean :
 	rm -f $(CLEANSRCS) cleansrc