anchor.diff:      libassimp-dev \
       libassimp3 \
       libboost-python-dev \
  -    mongodb-10gen \
  +    mongodb-org \
       python3-matplotlib \
       python3-netifaces \
       python3-numpy \
  
positive.code: # Clone Azrael from GitHub.
  RUN git clone https://github.com/olitheolix/azrael /demo/azrael
  
  # Expose the necessary Tornado and ZeroMQ ports.
  EXPOSE 8080 5555
  
  # Special environment variable to let Azrael know it runs in Docker.
  ENV INSIDEDOCKER 1
  
negative.code: RUN mkdir -p /demo/mongodb
  
  # Add APT credentials for MongoDB.
  RUN sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
  RUN echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
  
  # Install Ubuntu packages for Azrael.
  RUN apt-get update && apt-get install -y \
  