anchor.diff:  # Build OpenCV 3.x
   # =================================
   #RUN apt-get update -qq && apt-get install -y --force-yes libopencv-dev
  +RUN pip3 install --no-cache-dir --upgrade numpy
   WORKDIR /usr/local/src
   RUN mkdir -p opencv/release
   WORKDIR /usr/local/src/opencv/release
  
positive.code:           -D WITH_TBB=ON \
            -D BUILD_PYTHON_SUPPORT=ON \
            -D WITH_V4L=ON \
            ..
  
  RUN make -j ${NUM_CORES} \
  
negative.code:     && hg clone https://bitbucket.org/multicoreware/x265 \
      && git clone --depth 1 git://source.ffmpeg.org/ffmpeg \
      && git clone https://github.com/Itseez/opencv.git \
      && git clone https://github.com/Itseez/opencv_contrib.git \
      && git clone --depth 1 git://github.com/mstorsjo/fdk-aac.git \
      && git clone --depth 1 https://chromium.googlesource.com/webm/libvpx \
      && git clone --depth 1 git://git.opus-codec.org/opus.git \
  