anchor.diff:      echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 multiverse" > /etc/apt/sources.list.d/mongodb-org-3.2.list && \
       apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 32A37959C2FA5C3C99EFBC32A79206696452D198 && \
       echo "deb https://apt.buildkite.com/buildkite-agent stable main" > /etc/apt/sources.list.d/buildkite-agent.list && \
  -    apt-get update && \
  +    apt-get update -qq && \
       DEBIAN_FRONTEND=noninteractive \
         apt-get install -y \
           apt-file \
  
positive.code:         zip \
          ffmpeg && \
      rm -rf /var/lib/apt/lists/*
  
  # Build/install opencv3
  RUN git clone --branch '3.1.0' https://github.com/opencv/opencv.git && \
  
negative.code:         m4 \
          mkisofs \
          mongodb-org \
          mongodb-org-mongos \
          mongodb-org-server \
          mongodb-org-shell \
          mongodb-org-tools \
          mplayer \
          openjdk-7-jdk \
          openssh-server \
          pkg-config \
  