[Grml] grml-debootstrap VM creation broken due to bug in kpartx?

Hi!

My grml-debootstrap configuration is here: https://github.com/adrelanos/minimal-grml-debootstrap-test

(I think it's quite useful to have a single script/configuration around for producing minimal instructions on how to produce that bug.)

grml-debootstrap keeps failing for me. umount: /mnt/debootstrap.23035: device is busy

I guess it could be because this bug in kpartx: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734794

Cheers, adrelanos