Removing docker.io (1.13.1-0ubuntu1~16.04.2) ...
Purging configuration files for docker.io (1.13.1-0ubuntu1~16.04.2) ...

Nuking /var/lib/docker ...
  (if this is wrong, press Ctrl+C NOW!)

+ sleep 10

/var/lib/docker/nuke-graph-directory.sh: 64: /var/lib/docker/nuke-graph-directory.sh: shopt: not found
dpkg: error processing package docker.io (--purge):
 subprocess installed post-removal script returned error exit status 127