Bug#873634: missing module files libbd_*.so

[Amaury Pouly]

Same problem here. Tracking down the missing files, I found that 
installing the following packages solves the problem:

apt install libblockdev-crypto2 libblockdev-mdraid2 libblockdev-part2 
libblockdev-fs2 libblockdev-loop2 libblockdev-swap2