these 3 derivations will be built:
  /nix/store/szi9p7wkp6dcl6m51wi7hrlx5i8i39q5-driverConfiguration.json.drv
  /nix/store/3w68j9m5is5sjdhira1hsbynl8fd3fsz-nixos-test-driver-nix-grpc-farm.drv
  /nix/store/rv8mvrgp6rw99ppmdjbylpcwxxc3l228-vm-test-run-nix-grpc-farm.drv