Hi Ludo,

> > So... just leave the entire "search" instruction off if it's created by 
> > grub-mkrescue ?  That's how one could interpret thir "root device" 
> > sentence...  
> Oooh, interesting, that comes in handy.  :-)
> Now, how can we pass the information to ‘grub-configuration-file’ so
> that it doesn’t emit that “search” command?

I've gone ahead and pushed bug# 27705 to master.  That means that there's now a 
new bootloader "grub-mkrescue-bootloader" in gnu/bootloaders/grub.scm . So you 
can just override its "configuration-file-generator" by one that doesn't emit 
the "search" command (remainder should be fine as-is).

I wonder what would happen (to Grub) if someone did guix system reconfigure in 
a system booted from the ISO9660 image, though.  I think it would be better to 
not install any bootloader in the case of mkrescue and guix system reconfigure. 
 We might want to do a follow-up commit that adds a dummy installer to the 
"installer" field of grub-mkrescue-bootloader.  WDYT?

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