MarsSeed [1] filed a deletion request for osvr-cpi-git [2]: Broken since 2016 as per maintainer's comment from that year, and as per newer comments from AUR user @pix3l.
Upstream is abandoned since 2017. [a] My testing now also resulted in build failure. The whole OSVR project is abandoned for 5+ years; its website no longer exists. [b][c] [a]: https://github.com/OSVR/OSVR-Config [b]: http://osvr.com [c]: http://support.osvr.com/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/osvr-cpi-git/
