sudo vmbuilder kvm ubuntu --suite=xenial --flavour=virtual --arch=amd64 --mirror=http://archive.ubuntu.com/ubuntu --rootsize=30720 --swapsize=1024 --tmpfs=- -o --libvirt=qemu:///system --ip=198.58.44.138 --mask=255.255.255.128 --bcast=198.58.44.255 --gw=198.58.44.129 --bridge=br0 --components=main,universe,restricted --templates=/var/lib/libvirt/images/ubuntu-cdva-base/templates --user=cdeng --name=CDEngineering --pass=siX3ci0vc0re --addpkg=linux-image-generic --addpkg=vim --addpkg=acpid --addpkg=openssh-server --firstboot=/var/lib/libvirt/images/ubuntu-cdva-base/boot.sh --mem=2048 --cpus=4 --ssh-user-key=/home/cdeng/.ssh/authorized_keys --hostname=sage
2016-06-13 17:30:27,303 INFO    : Mounting tmpfs under /tmp/tmptP9wXltmpfs
2016-06-13 17:30:27,308 INFO    : Calling hook: preflight_check
2016-06-13 17:30:27,314 INFO    : Calling hook: set_defaults
2016-06-13 17:30:27,315 INFO    : Calling hook: bootstrap
2016-06-13 17:33:48,332 INFO    : Calling hook: configure_os
2016-06-13 17:33:57,622 INFO    : W: GPG error: http://us.archive.ubuntu.com/ubuntu precise-updates InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
2016-06-13 17:33:57,622 INFO    : W: The repository 'http://us.archive.ubuntu.com/ubuntu precise-updates InRelease' is not signed.
2016-06-13 17:33:57,622 INFO    : W: GPG error: http://security.ubuntu.com/ubuntu precise-security InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
2016-06-13 17:33:57,623 INFO    : W: The repository 'http://security.ubuntu.com/ubuntu precise-security InRelease' is not signed.
2016-06-13 17:33:57,623 INFO    : W: GPG error: http://us.archive.ubuntu.com/ubuntu precise-backports InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
2016-06-13 17:33:57,623 INFO    : W: The repository 'http://us.archive.ubuntu.com/ubuntu precise-backports InRelease' is not signed.
2016-06-13 17:33:57,623 INFO    : W: GPG error: http://us.archive.ubuntu.com/ubuntu precise Release: Could not execute 'apt-key' to verify signature (is gnupg installed?)
2016-06-13 17:33:57,623 INFO    : W: The repository 'http://us.archive.ubuntu.com/ubuntu precise Release' is not signed.
2016-06-13 17:33:57,939 INFO    : E: Unable to correct problems, you have held broken packages.
2016-06-13 17:33:57,939 INFO    : Cleaning up
2016-06-13 17:33:58,959 ERROR   : Process (['chroot', '/tmp/tmptP9wXltmpfs', 'apt-get', 'install', '-y', '--force-yes', 'linux-image-generic', 'vim', 'acpid', 'openssh-server']) returned 100. stdout: Reading package lists...
Building dependency tree...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 acpid : Depends: upstart-job
         Depends: module-init-tools (> 3.1-rel-2) but it is not going to be installed
 linux-image-generic : Depends: linux-image-3.2.0-104-generic but it is not going to be installed
 openssh-server : Depends: upstart-job
 vim : Depends: vim-common (= 2:7.3.429-2ubuntu2.1) but 2:7.4.1689-3ubuntu1 is to be installed
, stderr: E: Unable to correct problems, you have held broken packages.

2016-06-13 17:33:58,960 INFO    : Unmounting tmpfs from /tmp/tmptP9wXltmpfs
Traceback (most recent call last):
  File "/usr/bin/vmbuilder", line 24, in <module>
    cli.main()
  File "/usr/lib/python2.7/dist-packages/VMBuilder/contrib/cli.py", line 216, in main
    distro.build_chroot()
  File "/usr/lib/python2.7/dist-packages/VMBuilder/distro.py", line 84, in build_chroot
    self.call_hooks('configure_os')
  File "/usr/lib/python2.7/dist-packages/VMBuilder/distro.py", line 67, in call_hooks
    call_hooks(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 165, in call_hooks
    getattr(context, func, log_no_such_method)(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/ubuntu/distro.py", line 147, in configure_os
    self.suite.install_extras()
  File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/ubuntu/dapper.py", line 202, in install_extras
    self.run_in_target(env={ 'DEBIAN_FRONTEND' : 'noninteractive' }, *cmd)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/ubuntu/dapper.py", line 327, in run_in_target
    return self.context.run_in_target(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/__init__.py", line 86, in run_in_target
    return util.run_cmd('chroot', self.chroot_dir, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 120, in run_cmd
    raise VMBuilderException, "Process (%s) returned %d. stdout: %s, stderr: %s" % (args.__repr__(), status, mystdout.buf, mystderr.buf)
VMBuilder.exception.VMBuilderException: Process (['chroot', '/tmp/tmptP9wXltmpfs', 'apt-get', 'install', '-y', '--force-yes', 'linux-image-generic', 'vim', 'acpid', 'openssh-server']) returned 100. stdout: Reading package lists...
Building dependency tree...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 acpid : Depends: upstart-job
         Depends: module-init-tools (> 3.1-rel-2) but it is not going to be installed
 linux-image-generic : Depends: linux-image-3.2.0-104-generic but it is not going to be installed
 openssh-server : Depends: upstart-job
 vim : Depends: vim-common (= 2:7.3.429-2ubuntu2.1) but 2:7.4.1689-3ubuntu1 is to be installed
, stderr: E: Unable to correct problems, you have held broken packages.