diff --git a/INSTALL/ventoy_pack.sh b/INSTALL/ventoy_pack.sh
index 3e62539a..bee6263b 100644
--- a/INSTALL/ventoy_pack.sh
+++ b/INSTALL/ventoy_pack.sh
@@ -40,7 +40,9 @@ done
 
 format_ventoy_disk_mbr 0 $LOOP fdisk
 
-$GRUB_DIR/sbin/grub-bios-setup  --skip-fs-probe  --directory="./grub/i386-pc"  $LOOP
+pwd
+ls -lah ./grub/i386-pc/
+$GRUB_DIR/sbin/grub-bios-setup --verbose --skip-fs-probe  --directory="./grub/i386-pc"  $LOOP
 
 curver=$(get_ventoy_version_from_cfg ./grub/grub.cfg)