> So I tried removing services colord, network-manager and upower; which 
> are the only gnome-based services in my config.scm; then no boot issues 
> and reconfigure warnings.
> 
> When I add them back, the warnings happen and boot fails.

Things are okay now after `guix gc --delete-generations` and then 
retrying `guix system reconfigure`.

Regards,
RG.