From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jack Hill <jackhill@jackhill.us>
Subject: bug#34890: guix system: error: failed to install bootloader
Date: Sun, 17 Mar 2019 01:01:56 -0400 (EDT)
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To: Brett Gilio <brettg@posteo.net>
Cc: 34890@debbugs.gnu.org

On Sat, 16 Mar 2019, Brett Gilio wrote:

> I can replicate this bug, however it is still successfully installing a
> new system configuration. The error printout seems erroneous (pun
> intended).

Indeed, I also do get a new system configuration reflecting my changes. 
However, I'm not sure if the output is just erroneous of if grub is really 
failing to be installed. By that I mean that the grub-install call is 
failing, resulting in this output. Since grub has been previously 
installed to my disk, most of the time I don't need to install the 
bootloader binary again, so this failure doesn't cause problems.

> I am sure there is a regression somewhere, but it does not seem to
> adversely effect the method in question.

I wonder if Ludovic's recent work [0][1] on handeling the bootloader 
messages could be the cause.

[0] 22f95e028f038cee342f455dfc55bd32b804907c
[1] f0cc5e7e1e4c03af29c5d4855dc5962502c49147