these 2 derivations will be built:
  /nix/store/1ywmvvyba6ymvyb1ahgkrdvvlka219kn-nix-grpc-store-0.1.0.drv
  /nix/store/cbjqzkfi74jfgfpmaj07d1bj7czfwwmz-nix-grpc-store-exit-stress.drv