fix

hooks/archiso

@@ -98,7 +98,7 @@ _mnt_dev() {
 
     msg ":: Mounting '${dev}' to '${mnt}'"
 
-    if ! [ -d "${dev}" ]; then
+    if mountpoint -q "${dev}"; then
         while ! poll_device "${dev}" 30; do
             echo "ERROR: '${dev}' device did not show up after 30 seconds..."
             echo "   Falling back to interactive prompt"