these 2 derivations will be built:
  /nix/store/kh9cp4kcxd31dka1ih4miwvmqi9sbdmq-nix-grpc-store-0.2.1.drv
  /nix/store/zz1mk6hhd9ahyf3mhx5ldnrd3l1d6by1-nix-grpc-store-dispatcher.drv