diff --git a/minix/llvm/clientctl b/minix/llvm/clientctl
index f97806dfd..e32e397d9 100755
--- a/minix/llvm/clientctl
+++ b/minix/llvm/clientctl
@@ -20,7 +20,7 @@ function rc_create {
 
 set -o errexit
 
-mkdir /ext
+[ -d /ext ] || mkdir /ext
 mount -t ext2 /dev/c0d1 /ext
 
 if [ -f /ext/etc/rc ]; then