anchor.diff:              --enable-libvorbis \
               --enable-libvpx \
               --enable-libx264 \
  -            --enable-libx265 \
               --enable-nonfree \
               --enable-openssl \
       && make -j ${NUM_CORES} \
  
positive.code: # Build libx265
  # =================================
  WORKDIR  /usr/local/src/x265/build/linux
  RUN cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr ../../source \
      && make -j ${NUM_CORES} \
      && make install
  # =================================
  
negative.code: # Build ffmpeg.
  # =================================
  
  # NOTE: Disableling libx265 for now
  #       as it no longer compiles
  #            --enable-libx265 \
  #
  WORKDIR /usr/local/src/ffmpeg
  RUN ./configure --extra-libs="-ldl" \
              --enable-gpl \
  