these 2 derivations will be built:
  /nix/store/x5h55wgiv1lsa4zg2yy6pqlxy40106ak-nixos-test-driver-wal2json.drv
  /nix/store/4m3xcznswdzcpfd8i3aqvbj8c0psxxss-vm-test-run-wal2json.drv