these 2 derivations will be built:
  /nix/store/7axlm71r3lzpxhk2k9w234h2hi1dqlf3-nix-grpc-store-0.2.2.drv
  /nix/store/qb4qb8ckbjm8jn84k9bj64q4s770k972-nix-grpc-store-dispatcher.drv