both net-firewall/iptables-1.4.21-r1 and sys-apps/systemd-units-22 try to install a version of /usr/lib/systemd/system/iptables.service. Reproducible: Always
This is from an unofficial user overlay, you need to report to that overlay maintainer. description User collaboration on ebuilds for the systemd init system owner Henry Gebhardt <hsggebhardt@googlemail.com> last change Sat, 18 Jan 2014 12:22:03 -0600 (13:22 -0500) URL git://git.overlays.gentoo.org/user/systemd.git https://git.overlays.gentoo.org/gitroot/user/systemd.git git+ssh://git@git.overlays.gentoo.org/user/systemd.git
exactly