Comment # 11 on bug 1207721 from Stefan Dirsch

Honestly. Most likely I will never look into this again. So if it's important
for you I suggest to report the issue upstream on 

  https://gitlab.freedesktop.org/xorg/proto/xorgproto/-/issues

But I cannot rule out a packaging bug on our side either. I looked at the
Fedora package. They even don't package the XML files at all.

  https://koji.fedoraproject.org/koji/buildinfo?buildID=2134927