diff --git a/setup.sh b/setup.sh
index 364be7c..e53a3b6 100755
--- a/setup.sh
+++ b/setup.sh
@@ -42,7 +42,7 @@ mount "$esp" "$chroot/boot/efi"
 
 # additional data disks
 mkfs.ext4 "$longhorn"
-mkdir -p "$chroot/var/lib/longhorn"
+mkdir --parents "$chroot/var/lib/longhorn"
 
 
 # debootstrap