anchor.diff:    && ln -s /var/shared/Dropbox/freshbooks \
     && ln -s /var/shared/Dropbox/projects \
     && ln -s /var/shared/Dropbox/gnupg .gnupg \
  -  && chown -R marvin: /home/marvin
  +  && chown -R root: /root
   
   # Set up the golang development environment
   RUN mkdir -p /goprojects/bin
  
positive.code: # This is probably a Docker bug.
  RUN mkdir /var/shared/ \
    && touch /var/shared/placeholder \
    && chown -R marvin: /var/shared
  VOLUME /var/shared
  
  # Link in shared parts of the home directory
  WORKDIR /home/marvin
  RUN ln -s /var/shared/.ssh \
    && ln -s /var/shared/.bash_logout \
    && ln -s /var/shared/.bash_profile\
  
negative.code:   && rm -rf /var/lib/{apt,dpkg,cache,log}/ \
    && heroku --version
  
  # Install the diff-highlight script
  RUN mkdir -p /root/bin \
    && wget -O /root/bin/diff-highlight https://raw.githubusercontent.com/git/git/master/contrib/diff-highlight/diff-highlight \
    && chown root: /root/bin/diff-highlight \
    && chmod +x /root/bin/diff-highlight
  
  # Create a shared data volume
  # We need to create an empty file, otherwise the volume will
  