anchor.diff:  
   RUN apt-get update \
       && apt-get install -yq --no-install-recommends \
  -        git wget curl youtube-dl gnupg2 libgconf-2-4 python3 python3-pip \
  +        git zlib1g-dev wget curl youtube-dl gnupg2 libgconf-2-4 python3 python3-pip \
       && rm -rf /var/lib/apt/lists/*
   
   # Install latest chrome package and fonts to support major charsets (Chinese, Japanese, Arabic, Hebrew, Thai and a few others)
  -RUN apt-get update && apt-get install -y wget --no-install-recommends \
  -    && wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
  +RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
       && sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' \
       && apt-get update \
  -    && apt-get install -y google-chrome-unstable fonts-ipafont-gothic fonts-wqy-zenhei fonts-thai-tlwg fonts-kacst ttf-freefont \
  +    && apt-get install -y chromium-browser fonts-ipafont-gothic fonts-wqy-zenhei fonts-thai-tlwg fonts-kacst ttf-freefont \
         --no-install-recommends \
       && rm -rf /var/lib/apt/lists/* \
       && rm -rf /src/*.deb
  
positive.code: # This Dockerfile for ArchiveBox installs the following in a container:
  #     - curl, wget, python3, youtube-dl, google-chrome-unstable
  #     - ArchiveBox
  # Usage:
  #     docker build github.com/pirate/ArchiveBox -t archivebox
  
negative.code: 
  # Uncomment to skip the chromium download when installing puppeteer. If you do,
  # you'll need to launch puppeteer with:
  #     browser.launch({executablePath: 'chromium-browser'})
  ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true
  
  # Install puppeteer so it's available in the container.
  