On Fri, 12 Jun 2026 19:01:11 +0200, Stefan Sperling wrote:

> At present, a site set with custom files must be uploaded to the same
> mirror which base sets are fetched from. Else the site set is not
> available during installation and upgrades. This makes it a bit
> difficult to use official installation mirrors with site sets during
> upgrades since a custom mirror is required to serve the site set from.
>
> With the patch below, sysupgrade can handle a site set locally, while
> fetching sets from official mirrors.

This looks useful to me and looks correct.  OK millert@ if you fix
the trailing whitespace florian@ noted.

 - todd