these 2 derivations will be built:
  /nix/store/l8drscghnxvavnx04cm12gsgjm4hk2hz-nixos-test-driver-wal2json.drv
  /nix/store/c8lzhw5ahzd306bqn4mvgi96z25v3alf-vm-test-run-wal2json.drv