Drop-in directory to run scripts before rc.local?

[ephile]

Related:
From Qubes docs:

/rw/config/rc.local-early.d/*.rc, /rw/config/rc.local-early - scripts similar to /rw/config/rc.local, but running earlier in the system startup sequence - just before sysinit.target, and setting up the network.

and forum:

How to use rc.local-early in Qubes 4.2

/rw/config/rc.local-early is like /rw/config/rc.local with two important differences: It runs much earlier in the qube startup process It blocks until complete. This means that until the rc.local-early script exits, the qube is not considered to have started up, and subsequent systemd units and user gui apps will not run. Even though it is described in QubesOS’s live documentation, rc.local-early is not available in QubesOS’s current release at time of writing (that being version 4.2-- and it…