these 4 derivations will be built:
  /nix/store/qd6pw7fp4i8lr05jb5paxrzwnzk0h76k-test-script.drv
  /nix/store/q8vi7a0r3f5y73bfh0mwd83c3y2fy86m-driverConfiguration.json.drv
  /nix/store/wiwrm7s8p6354abrhd1pjz59qg9f4m22-nixos-test-driver-nix-grpc-farm.drv
  /nix/store/x0lb3rzj536ggdv8zzb2sh5bhy720yhr-vm-test-run-nix-grpc-farm.drv