these 2 derivations will be built:
  /nix/store/g678inxwz5lnnfcppgqg7rrm04an71fq-nix-grpc-store-0.2.2.drv
  /nix/store/wmqp0hvj2nrdxvf5cgfg9wl8w9jcw109-nix-grpc-store-dispatcher.drv