Atm, the timestamp is included in emerge --info. The first thing to point out is that in case / is in chroot, portage fails to detect if it is a git or rsync tree and reads only /etc/portage/repos.conf/ In case of tinderboxes, where they compile 24/7 it may happen that there are synces between the generation of build log and generation of emerge --info, so a good idea would be put the timestamp of the sync directly in the build log as it can help maintainers to detect if an issue is a duplicate or if an issue still persists after the sync. Would be also helpful print the URL of the git mirror, to detect if it is a gentoo-mirror (https://github.com/gentoo-mirror/gentoo) or this is directly our git repo (https://gitweb.gentoo.org/repo/gentoo.git/) Thanks