these 2 derivations will be built:
  /nix/store/xm494mrc25vdgqcqvach2r9vslggxa2g-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/f9gkrzkmz6nfi4h8xxv1hk76afyarhs6-nix-grpc-store-dispatcher.drv