Subject: 'guix system reconfigure' fails to install grub from standalone guix

From: Mark H Weaver <[email-masked]>
Date: Tue, 22 Jul 2014 13:01:22 -0400

I built guix from git master from within a standalone guix install.  I
then tried to run 'pre-inst-env guix system reconfigure' using the same
OS configuration, and it failed to install grub.

The error message said "failed to install GRUB on device '/dev/sda'",
which indicates that 'install-grub' raised an exception.

     Mark