Hi there! Nowadays openldap ebuild installs two systemd services for slapd: one in /lib/systemd/systemd/slapd.service (I assume it is the one it installs from it's internal by buildsystem), and "ours" (gentoo's from FILESDIR by systemd_dounit) in /usr/lib/systemd/system/slapd.service. On merged-usr systems this leads to file collision, as they're different in content. I guess, one of them should be removed (either stop installing "our" one from FILESDIR, or remove ustream one somewere before install and keep ours. Reproducible: Always
*** This bug has been marked as a duplicate of bug 885457 ***