anchor.diff:      python-werkzeug \
       python-xlwt \
       python-yaml \
  -    python-zbar
  +    python-zbar \
       python-zsi \
       qrencode \
  +    wget \
       xmlstarlet \ 
       xsltproc \
       zbar-tools 
  
positive.code: FROM ubuntu:12.04
  MAINTAINER Luis Triana <luis.triana@jarsa.com.mx>
  
  RUN echo 'APT::Get::Assume-Yes "true";' >> /etc/apt/apt.conf \
  
negative.code: 
  # Install wkhtmltopdf
  RUN cd /tmp && \
      wget http://wkhtmltopdf.googlecode.com/files/wkhtmltopdf-0.9.9-static-amd64.tar.bz2 && \
      tar xvjf wkhtmltopdf-0.9.9-static-amd64.tar.bz2 && \ 
      mv wkhtmltopdf-amd64 /usr/bin/wkhtmltopdf && \
      chmod +x /usr/bin/wkhtmltopdf
  
  # Install pip
  