anchor.diff:  ADD build/policy-rc.d /usr/sbin/policy-rc.d
   RUN chmod 755 /usr/sbin/policy-rc.d
   
  -RUN echo 'force-unsafe-io' | tee /etc/dpkg/dpkg.cfg.d/02apt-speedup
  -RUN echo 'DPkg::Post-Invoke {"/bin/rm -f /var/cache/apt/archives/*.deb || true";};' | tee /etc/apt/apt.conf.d/no-cache
  -RUN echo 'Acquire::http {No-Cache=True;};' | tee /etc/apt/apt.conf.d/no-http-cache
  +RUN \
  +    echo 'force-unsafe-io' | tee /etc/dpkg/dpkg.cfg.d/02apt-speedup \
  +    && echo 'DPkg::Post-Invoke {"/bin/rm -f /var/cache/apt/archives/*.deb || true";};' | tee /etc/apt/apt.conf.d/no-cache \
  +    && echo 'Acquire::http {No-Cache=True;};' | tee /etc/apt/apt.conf.d/no-http-cache
   
   # Disable SSH
   RUN rm -rf /etc/service/sshd /etc/my_init.d/00_regen_ssh_host_keys.sh
  
positive.code: # Used by the `build/ischroot` binary to behave in our custom way, to always say we are in a chroot.
  ENV FAKE_CHROOT 1
  RUN \
    dpkg-divert --remove /usr/bin/ischroot && \
    dpkg-divert --add --rename --divert /usr/bin/ischroot.original /usr/bin/ischroot
  ADD build/ischroot /usr/bin/ischroot
  RUN chmod 755 /usr/bin/ischroot
  
  
negative.code: FROM phusion/baseimage:latest
  MAINTAINER Maurice Kaag <mkaag@me.com>
  
  ENV HOME /root
  