bug#42856: match-error /sys/kernel/debug upon reconfiguring system

[Mathieu Othacehe]

Hello Maxim,

> I think it only occurs once (the following 'guix system reconfigure' on
> the same machine do not seem to suffer from that error).

This has been covered here: https://issues.guix.gnu.org/42826.

Thanks for reporting,

Mathieu