Bonjour Roland,

Roland Everaert 写道：
> Without the form (menu-entries), in the bootloader definition, 
> 'reconfigure' runs fine. So what am I doning wrong?

You're passing a single ‘menu-entry, but ’menu-entries’ takes a 
list of them--even if you have only one.

Try

  (bootloader
   (bootloader-configuration
    ...
    (menu-entries
     (list (menu-entry
            ...)))))

> However, after rebooting the system, the partition is mounted 
> properly, so
> it is only during the reconfigure that the partition has not 
> been mounted.
> Is this intentional?

Kind of, in that it's working as written.  ‘guix system 
reconfigure’ *will* start new services such as file systems, but 
this step is only performed after a successful reconfiguration -- 
and that includes installing GRUB to /boot first...

I didn't look into the service restart code.  Maybe this could be 
tweaked without turning it into a spaghetti mess, maybe not.

Kind regards,

T G-R