anchor.diff:      sed -Ei 's/(.*)secure_path.*/\1!secure_path/' /etc/sudoers && \
       touch /etc/init.d/systemd-logind && \
       cp /bin/true /bin/sync
  -    
  -# PHP runtime, based on defaults from
  -#   http://docs.travis-ci.com/user/ci-environment/#Extensions
  -#   https://devcenter.heroku.com/articles/php-support
  -# PHP Xdebug, most recent PECL version
  -ADD ./files/etc /etc
  -RUN apt-get update \
  -    && apt-get install -y php5 php5-cli \
  -        php5-curl php5-gd php5-json php5-pgsql php5-readline php5-sqlite \
  -        php5-tidy php5-xmlrpc php5-xsl php5-intl php5-mcrypt php5-mysqlnd \
  -    && php5enmod c9
  -RUN apt-get install -y php5-dev \
  -    && pecl install xdebug \
  -    && php5enmod xdebug
   
   # re-enable service startup. This line must come after all apt-get installs
   RUN rm -f /usr/sbin/policy-rc.d
  
positive.code:     wget -O /tmp/deb.deb https://www.dropbox.com/download?dl=packages/ubuntu/dropbox_1.6.0_amd64.deb && \
      dpkg -i /tmp/deb.deb && \
      rm /tmp/deb.deb
  
  # Python
  RUN apt-get install -y python3 python3-dev python3-setuptools ipython3 \
  
negative.code:     sudo -i -u ubuntu HOME=/home/ubuntu bash -i /etc/bash_completion && \
      HOME=/root bash -l /etc/bash_completion
  
  ADD ./files/home/ubuntu /tmp/homedir
  RUN cp /tmp/homedir/.gitignore /tmp/homedir/.hgignore && \
      mkdir -p /tmp/homedir/lib/apache2/lock /tmp/homedir/lib/apache2/log /tmp/homedir/lib/apache2/run && \
  