using guix in virtualbox

[westlake]

Hi, I've noticed that people have been using virtualbox with guix, but 
over here with 0.8.1 (64-linux), i'm noticing a bootup issue upon 
post-install

The setup is informative enough from the guix install page, on top of 
which I create two empty .vdi disks, and can use qemu-nbd to transfer 
the raw image of the usb-install.

It's actually pretty easy to set this up, and it took under 20 minutes. 
However after rebooting and then "unplugging" the installer drive from 
Virtualbox. The grub boot menu shows up, it appears the init starts but 
soon there is a freezing issue.

Not sure what to do from this point, I understand more details would be 
needed to see why this is happening so I added an attachment.

thanks