anchor.diff:  # Download the linux4tegra sources including nvidia packages.
   # Subject to the NVIDIA Customer License.
  -FROM ubuntu:latest AS nvsources
  +FROM ubuntu:18.04 AS nvsources
   
   # install wget + make data dir
   RUN mkdir -p /data /sources && \
  
positive.code:   cd ../ && rm -rf /sources/l4t_debs_workdir
  
  # Ubuntu upstream
  FROM ubuntu:18.04
  
  # NVIDIA upstream
  # FROM nvcr.io/nvidia/l4t-base:r32.4.3
  
  # setup environment
  ENV LANG=C.UTF-8 \
  
negative.code: 
  RUN systemctl set-default graphical.target && \
      systemctl mask tmp.mount && \
      (systemctl mask NetworkManager || true) && \
      rm /etc/systemd/system/nvwifibt.service && \
      echo "nvidia	ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
  
  WORKDIR /
  ENTRYPOINT ["/lib/systemd/systemd"]
  