EFI entry got removed after system reconfigure

[Roel Janssen]

Dear Guix,

I ran:
$ guix system reconfigure /etc/config.scm

Which succeeded.  Then rebooted, to find that my computer wouldn't boot
anymore due to a missing EFI entry.

So I created a new entry from a LiveUSB using “efibootmgr” to boot into
GuixSD again.  Is this a known problem, and will it happen again when I
reconfigure the system?

Kind regards,
Roel Janssen