anchor.diff:          --enable-libx265 \
           --enable-libxcb \
           --enable-libxvid \
  -        --enable-libzmq \
  -        --enable-nonfree \
           --enable-small \
           --enable-version3 \
           --extra-cflags="-I${PREFIX}/include" \
  
positive.code:         make install && \
          rm -rf ${DIR}
  
  ## libzmq https://github.com/zeromq/libzmq/
  RUN \
          DIR=/tmp/libzmq && \
          mkdir -p ${DIR} && \
          cd ${DIR} && \
          curl -sLO https://github.com/zeromq/libzmq/archive/v${LIBZMQ_VERSION}.tar.gz && \
          echo ${LIBZMQ_SHA256SUM} | sha256sum --check && \
          tar -xz --strip-components=1 -f v${LIBZMQ_VERSION}.tar.gz && \
          ./autogen.sh && \
          ./configure --prefix="${PREFIX}" && \
          make && \
          make check && \
          make install && \
          rm -rf ${DIR}
  
  ## libsrt https://github.com/Haivision/srt
  RUN \
          DIR=/tmp/srt && \
  
negative.code:         --enable-libopencore-amrwb \
          --enable-libopenjpeg \
          --enable-libopus \
          --enable-libsoxr \
          --enable-libsrt \
          --enable-libtheora \
          --enable-libvidstab \
  