anchor.diff:    | APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=DontWarn apt-key add - \
     && wget -q -O /etc/apt/sources.list.d/mopidy.list https://apt.mopidy.com/buster.list \
     && apt-get update \
  -  && apt-get install -y libspotify-dev \
  +  && apt-get install -y libspotify-dev mopidy-spotify \
     && rm -rf /var/lib/apt/lists/*
   
   # Clone Iris from the repository and install in development mode.
  
positive.code: RUN python3 -m pip install --no-cache \
    tox \
    mopidy-mpd \
    mopidy-spotify \
    mopidy-local \
    dbus-python \
    # pip not up-to-date for Mopidy-Tidal (https://github.com/tehkillerbee/mopidy-tidal/issues/14)
  
negative.code: COPY VERSION /
  
  # Allows any user to run mopidy, but runs by default as a randomly generated UID/GID.
  # RUN useradd -ms /bin/bash mopidy
  ENV HOME=/var/lib/mopidy
  RUN set -ex \
   && usermod -G audio,sudo mopidy \
  