powersj@z170:/tmp/cloud_test_data_mmnwhrh_$ sudo mount-image-callback --system-mounts --system-resolvconf cloud-test-ubuntu-xenial-image-modification-ghc4bs5p54krkhk5i4w.qcow2 -- chroot _MOUNTPOINT_ /bin/sh -c dpkg-query -W --showformat='${Version}' cloud-init
dpkg-query: error: need an action option

Use --help for help about querying packages.

Command: ['sudo', 'mount-image-callback', '--system-mounts', '--system-resolvconf', '/tmp/cloud_test_data_onx6vpjq/cloud-test-ubuntu-xenial-image-modification-0qbpa0u6aszz1jbleg0.qcow2', '--', 'chroot', '_MOUNTPOINT_', '/bin/sh', '-c', 'dpkg-query', '-W', "--showformat='${Version}'", 'cloud-init']
Exit code: 2
Reason: -
Stdout: -
Stderr: dpkg-query: error: need an action option