Comment 1 for bug 1659578

I am stuck because of this bug as well. Can not build image -

disk-image-create -o ubuntu2.qcow2 ubuntu grub2 baremetal devuser

I see the following error and then everything is downhill from there -

Creating config file /etc/default/grub with new version
/usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?).
dpkg: error processing package grub-efi-amd64 (--configure):
 subprocess installed post-installation script returned error exit status 1