-for deb in "/root$install_dir"/*; do
- if ! chroot /root dpkg -i "$install_dir/$deb"; then
- chroot /root dpkg -P "${deb%%_*}"
+for deb in "/root$install_dir"/*
+do
+ [ -f "$deb" ] || continue
+
+ debbase="${deb##*/}"
+
+ if ! chroot /root dpkg -i "$install_dir/$debbase"
+ then
+ chroot /root dpkg -P "${debbase%%_*}"