these 2 derivations will be built:
  /nix/store/lf2b0358fq6i1pavhwh8yax9a2cw8y5x-nix-grpc-store-0.2.3.drv
  /nix/store/k67sfm5jp15gkkhsl639yj3kb9qjqx9q-nix-grpc-store-dispatcher.drv