anchor.diff: -FROM ubuntu:18.04 AS base
  +FROM ubuntu:20.04 AS base
   
   ENV DEBIAN_FRONTEND noninteractive
   ENV HOME /tmp
  
positive.code:   # Additional runtime libs \
    libgavl1 libsox3 libexif12 xvfb libxkbcommon-x11-0 libhyphen0 libwebp6 \
    # LADSPA plugins \
    amb-plugins ambdec autotalent blepvco blop bs2b-ladspa calf-ladspa caps cmt \
    csladspa fil-plugins guitarix-ladspa invada-studio-plugins-ladspa mcp-plugins \
    omins rev-plugins ste-plugins swh-plugins tap-plugins vco-plugins wah-plugins \
    # Fonts \
    fonts-liberation 'ttf-adf-.+'
  
  # Install the build
  COPY --from=build /usr/local/ /usr/local/
  
negative.code:   libsox-dev libsdl2-dev libgtk2.0-dev libsoup2.4-dev \
    qt5-default libqt5webkit5-dev libqt5svg5-dev \
    libexif-dev libtheora-dev libvorbis-dev python3-dev cmake xutils-dev \
    libegl1-mesa-dev libeigen3-dev libfftw3-dev libvdpau-dev meson ninja-build
  
  # Get and run the build script
  RUN wget --quiet -O /tmp/build-melt.sh https://raw.githubusercontent.com/mltframework/mlt-scripts/master/build/build-melt.sh && \
  