tecnotercio [1] filed a orphan request for openfx-arena [2]:
The PKGBUILD has been broken since April, as noted in the package's comments. The maintainer has not solved the problem so far.
[1] https://aur.archlinux.org/account/tecnotercio/ [2] https://aur.archlinux.org/pkgbase/openfx-arena/
Request #11867 has been accepted by coderobe [1].
aur-requests@lists.archlinux.org