These are notes I made while creating a new xvm hypervisor on Precise:

• create schroot with 'sbuild-createchroot /srv/chroot/precise-amd64-sbuild ​http://mirrors.mit.edu/ubuntu'
• defang init inside the schroot:

  dpkg-divert --local /sbin/initctl
  mv /sbin/initctl /sbin/initctl.distrib
  ln -s /bin/true /sbin/initctl
  

• created /usr/sbin/policy-rc.d inside the chroot, containing:

  #!/bin/sh
  
  exit 101