Request #17158 has been rejected by diabonas [1]: Upstream development is still active, so I recommend opening a bug report at https://github.com/ANTsX/ANTsPy/issues to get this issue fixed. If you don't want to maintain the package any more, you can disown it so somebody else can take over.
[1] https://aur.archlinux.org/account/diabonas/
