_pivot_root_module()
{
	local cur
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	case $COMP_CWORD in
		1|2)
			compopt -o filenames
			COMPREPLY=( $(compgen -o dirnames -- ${cur:-"/"}) )
			;;
	esac
	return 0
}
complete -F _pivot_root_module pivot_root