these 2 derivations will be built:
  /nix/store/4cp4n183v4zdfqxh5s7fji7lswhy3iac-nix-grpc-store-0.1.0.drv
  /nix/store/l4s7a8f5y5g58xf552f9w6ikrzpcmjdq-nix-grpc-store-exit-stress.drv