Re: make doc error on current master

>>> If you compile LilyPond from scratch please retry a compilation
>>> with a FontConfig version equal to or larger than 2.15 –
>>> theoretically, Variation Fonts should be rejected correctly.  If
>>> you can't or won't do that you have to replace the VFs with non-VF
>>> versions.
>> 
>> I compiled LilyPond from scratch using FontConfig 2.16.
> 
> So you say you get exactly the same error message?

Aah, now I remember.  This is

  https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues/362

and the suggested new FontConfig keyword 'namedinstances' has been
added to version 2.15.

For the time being, please modify `99-lilypond-fonts.conf` as
suggested in that issue; I'll submit a PR that adds this automatically
to LilyPond if FontConfig >= 2.15 is found on the system.


    Werner