xorg-server-xnest is no longer available
xorg-server-xnest has been removed from the [extra] repository.
However, this package or replacements are available elsewhere:
- xenocara-server-xnest 1.20.10-5 [extra] (x86_64)
- xenocara-server-xnest-debug 1.20.10-6 [extra] (x86_64)