these 2 derivations will be built:
  /nix/store/3ag6rnvb07qlv9wkja5ldp502fday7sr-nixos-test-driver-wal2json.drv
  /nix/store/6zzh26s2d8czbhlwzpydzcwr7s8wfkwf-vm-test-run-wal2json.drv