SunRed [1] filed a deletion request for docker-ipv6nat [2]: This functionality is native to Docker for quite a while now and as a result upstream is not actively maintained anymore so this package is obsolete and redundant.
[1] https://aur.archlinux.org/account/SunRed/ [2] https://aur.archlinux.org/pkgbase/docker-ipv6nat/
