these 4 derivations will be built:
  /nix/store/md0y20sk2v9wj772n70wq1ci5gzsjw33-test-script.drv
  /nix/store/n9d15ni3hcd4g40n8k86n2q0bgllwl3r-driverConfiguration.json.drv
  /nix/store/2b88mn8yq67f3nb65k27z1b35ikm866h-nixos-test-driver-nix-grpc-farm.drv
  /nix/store/frq3xwd8i3ziy31j85w6xafh2wfr79l2-vm-test-run-nix-grpc-farm.drv