these 2 derivations will be built:
  /nix/store/hphgvsxkj7dija8dz7w78bhljgvwfijf-nix-grpc-store-0.2.3.drv
  /nix/store/n695z0238pg4n8kzrf8ykvfgkwz9l98n-nix-grpc-store-dispatcher.drv