+*--pre-scripts*[=<_directory_>]::
+
+ When using *--pre-scripts* without the optional '=<_directory_>'
+ parameter, it enables executing scripts from the default
+ '<confdir>/pre-scripts/' directory before executing the chroot script.
+ If the optional parameter is given, execute scripts from the specified
+ directory instead. This allows customization of the system before the
+ chroot has been set up. The environment variable $MNTPOINT is available
+ inside the scripts for direct access of the chroot.