anchor.diff:              --enable-libvorbis \
               --enable-libvpx \
               --enable-libx264 \
  -            --enable-shared \
               --enable-nonfree
   RUN make -j ${NUM_CORES}
   RUN make install
  
positive.code: 
  # Build OpenCV 3.x
  # =================================
  RUN apt-get update -qq && apt-get install -y --force-yes libopencv-dev
  WORKDIR /usr/local/src
  RUN mkdir -p opencv/release
  WORKDIR /usr/local/src/opencv/release
  
negative.code:     autoconf \
      automake \
      mercurial \
      build-essential \
      checkinstall \
      cmake \
  