these 2 derivations will be built:
  /nix/store/62ffjicjfbvyhrjf8rnb85cj9xg3049i-nix-grpc-store-0.2.3.drv
  /nix/store/31xy4zpsq4ys7jbq3cyj0f0hcb82d6w1-nix-grpc-store-exit-stress.drv