these 2 derivations will be built:
  /nix/store/6ap447kv2ad27687j6laxmarv3c4i81x-nix-grpc-store-0.2.3.drv
  /nix/store/27fq22iasvd8xmn552z9bxhzjrj6s343-nix-grpc-store-exit-stress.drv