FadeMind [1] filed a deletion request for virtualbox-modules-r500v [2]: Pacman with dkms co-operating for automatic update external drivers via dkms hooks. So, this package is not needed anymore, and user should using DKMS based drivers.
[1] https://aur.archlinux.org/account/FadeMind/ [2] https://aur.archlinux.org/pkgbase/virtualbox-modules-r500v/
