these 2 derivations will be built:
  /nix/store/2r0q22i921ip57bac8rcr7yqdck6r2bm-nix-grpc-store-0.1.0.drv
  /nix/store/1gn1qfczdanllskbwbqmq8gdplvhnmqm-nix-grpc-store-exit-stress.drv