FabioLolix [1] filed a deletion request for nvidia-utils-vulkan- developer-beta [2]:
Packaged here old unmaintained version 381, last update on 2017-08-19. In the AUR there are 3 variants of beta nvidia drivers, all up to date, which likely superseded this package [1] https://aur.archlinux.org/account/FabioLolix/ [2] https://aur.archlinux.org/pkgbase/nvidia-utils-vulkan-developer-beta/
