these 2 derivations will be built:
  /nix/store/s7j883d9y7lqbvlgw5a6pzrnzb2p8q3m-nix-grpc-store-0.2.3.drv
  /nix/store/pymb64qb2vj5g7g8r93f4ymcn8mdvwvm-nix-grpc-store-exit-stress.drv