these 2 derivations will be built:
  /nix/store/zs34y98mqq4frysbz9s645vr0mz7wx18-nix-grpc-store-0.2.2.drv
  /nix/store/lkrsd7r8876j5i879v76ryijcrfzwhgh-nix-grpc-store-dispatcher.drv