these 2 derivations will be built:
  /nix/store/wgxwrmgz29x53gzhfpkv0655g5jgzh1a-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/9153vpvn8rw3s73xkj7gkj2r04r94ll4-nix-grpc-store-dispatcher.drv