The nexus instance should be available for everyone:
https://nexus.apps.ovirt.org/repository/npm/
Is it possible to set several repos in yarn so that it can access upstream directly if nexus is not reachable for some reason?
Alternatively, can we just pass a custom repo in pur CI as an env var or just create it for a run that runs in our CI so that nexus is used only when a certain condition is met?
I am not sure however if there are common workarounds for this in practise that could allow us to use nexus and fail over if it's not reachable.