Preparing to unpack .../nvidia-331-uvm_340.76-0ubuntu0.1_amd64.deb ...
Removing all DKMS Modules
Done.
Unpacking nvidia-331-uvm (340.76-0ubuntu0.1) over (331.113-0ubuntu0.0.4) ...
dpkg: error processing package nvidia-331 (--purge):
 package is in a very bad inconsistent state; you should
 reinstall it before attempting a removal