Comment # 12 on bug 1050904 from Lukas Ocilka

OK, decided. For now, we'll use _("Installation Repository") and let's
collect the feedback. This is the simplest solution. It can be changed
later if really really needed.

It will be solved in
https://trello.com/c/qTQ8pcOE/1645-lean-os-installer-manual-installation-known-changes-decisions