anchor.diff:  FROM golang:1.8
   MAINTAINER Mattias Wadman mattias.wadman@gmail.com
  +
  +ENV FFMPEG_VERSION=n3.3
  +ENV YDL_VERSION=2017.05.01
  +ENV TINI_VERSION=v0.14.0
   
   RUN \
     sed -i 's/main/main contrib non-free/g' /etc/apt/sources.list && \
  
positive.code:   ldconfig
  
  RUN \
    curl -L -o /usr/local/bin/youtube-dl https://yt-dl.org/downloads/2017.05.01/youtube-dl && \
    chmod a+x /usr/local/bin/youtube-dl
  
  RUN \
    curl -L -o /usr/local/bin/tini https://github.com/krallin/tini/releases/download/v0.14.0/tini && \
    chmod a+x /usr/local/bin/tini
  
  COPY . /go/src/github.com/wader/ydls/
  
negative.code:   apt-get clean
  
  RUN \
    git clone --branch $FFMPEG_VERSION --depth 1 https://github.com/FFmpeg/FFmpeg.git && \
    (cd FFmpeg && \
      ./configure \
        --toolchain=hardened \
  