anchor.diff:  RUN \
     curl -L -o /usr/local/bin/youtube-dl https://yt-dl.org/downloads/$YDL_VERSION/youtube-dl && \
     chmod a+x /usr/local/bin/youtube-dl
  -COPY --from=ffmpeg-builder \
  -  /usr/local/bin/ffmpeg \
  -  /usr/local/bin/ffprobe \
  -  /usr/local/bin/
  +COPY --from=mwader/static-ffmpeg:3.4.2 /* /usr/local/bin/
   
   COPY cmd /go/src/github.com/wader/ydls/cmd
   COPY internal /go/src/github.com/wader/ydls/internal
  
positive.code: COPY entrypoint.sh /usr/local/bin
  COPY ydls.json /etc
  
  # make sure all binaries work and do some sanity checks (https, DNS)
  RUN \
    youtube-dl --version && \
    ffmpeg -version && \
    ffprobe -version && \
    ydls -version && \
    ffmpeg -i https://www.google.com 2>&1 | grep -q "Invalid data found when processing input"
  
  USER nobody
  EXPOSE $PORT/tcp
  
negative.code:   python \
    rtmpdump \
    mplayer
  COPY --from=mwader/static-ffmpeg:3.4.2 /* /usr/local/bin/
  COPY --from=ydls-builder \
    /go/bin/ydls \
    /usr/local/bin/youtube-dl \
  