these 2 derivations will be built:
  /nix/store/zx0wgnzrncrydpjhfavrb0gxfjcv8wk6-nixos-test-driver-wal2json.drv
  /nix/store/n0ii83ldcrl7ly3rdy1jd93ja99i3mlr-vm-test-run-wal2json.drv