anchor.diff: -FROM armbuild/ubuntu-debootstrap:trusty
  +FROM ubuntu-debootstrap:trusty
   
   # Prevent init scripts from running during install/update
   # policy-rc.d (for most scripts)
  -RUN echo $'#!/bin/sh\nexit 101' > /usr/sbin/policy-rc.d && \
  +RUN echo '#!/bin/sh\nexit 101' > /usr/sbin/policy-rc.d && \
       chmod +x /usr/sbin/policy-rc.d
   
   # Install packages
   ADD ./patches/etc/apt/sources.list /etc/apt/sources.list
  -RUN apt-get -q update &&
  -    apt-get -q upgrade &&
  +RUN apt-get -q update && \
  +    apt-get -q upgrade && \
       apt-get install -y -q \
   	cron \
   	curl \
  
positive.code:         /root/.bash_history \
          /usr/sbin/policy-rc.d \
          /var/cache/apt/archives/*.deb \
      apt-get clean
  
  # Update locate cache
  RUN updatedb
  
  # Update aptitude cache
  RUN apt-get update
  
negative.code: # - remove /etc/hostname and resolv.conf that contains build information and will be regenerated using from dhcp
  # - Remove hacks
  #   - Prevent init scripts from running during install/update
  RUN rm -f \
  	/etc/hostname \
  	/etc/resolv.conf \
  	/etc/ssh/*_key* \
  