these 2 derivations will be built:
  /nix/store/95fnnlgsiksy6jp7gl6bja6pmiax19a1-nixos-test-driver-wal2json.drv
  /nix/store/xkshnhwcg5rb81g8wi5q3k2ybiv786sb-vm-test-run-wal2json.drv