anchor.diff:  # Remove dev packages
   RUN rpm -e gcc cpp ppl cloog-ppl
   RUN rpm -qa --queryformat '%{NAME}\n' | grep -- '-devel$' | xargs rpm -e  
  +
  +# Add the perlweb user
  +RUN groupadd -r perlweb && useradd -r -g perlweb perlweb
   
   # Set Combust environment 
   ENV CBROOTLOCAL /perlweb/
  
positive.code: # Install perl -5.22.0
  ENV PERLBREW_ROOT /perl5
  RUN curl -L http://install.perlbrew.pl | bash
  RUN /perl5/bin/perlbrew init
  RUN /perl5/bin/perlbrew install -j 4 perl-5.22.0; perlbrew clean; rm -fr /perl5/perls/perl-*/man
  RUN /perl5/bin/perlbrew install-cpanm
  RUN /perl5/bin/perlbrew switch perl-5.22.0
  ENV PATH /perl5/bin:/perl5/perls/perl-5.22.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
  ENV PERLBREW_PERL perl-5.22.0
  ENV PERLBREW_MANPATH /perl5/perls/perl-5.22.0/man
  ENV PERLBREW_PATH /perl5/bin:/perl5/perls/perl-5.22.0/bin
  ENV PERLBREW_SKIP_INIT 1
  
  # Install required CPAN modules
  ADD modules /tmp/.modules
  
negative.code: VOLUME /perlweb
  WORKDIR /perlweb
  
  # Expose port 8230
  EXPOSE 8230
  
  # Change to perlweb user
  USER perlweb
  ENTRYPOINT ["combust/bin/httpd"]
  