these 2 derivations will be built:
  /nix/store/xvn7gv131gr925qdhz26jddy5nnk8qha-nix-grpc-store-0.2.2.drv
  /nix/store/vsni3ygi0ly7szpygvza0wkvf4mf3s5k-nix-grpc-store-dispatcher.drv