How to build Nougat version of e/os?

Ok, I take from Week 12, 2022 : Development and Testing Updates

Issues with device still on Oreo or Nougat

We are facing build issues with devices still stuck on Oreo and Nougat. The attempt is to check which can be upgraded. If not possible, we will have to stop supporting those specific devices.

So, the build system is broken for Android 7 and cannot be fixed? I assume that the Docker image then won’t work as well, right? Well, I hoped by choosing the right tag from https://gitlab.e.foundation/e/os/releases I would be able to init a repo consistent for building something like v.21.1-nougat… But apparently it is not so easy…