these 2 derivations will be built:
  /nix/store/yrc78fjhpc18l9dmb1p7x3vcb95ara6k-nix-grpc-store-0.1.0.drv
  /nix/store/lk47gb4kdx2dsnjvrwxkj6nsn8hqn1gq-nix-grpc-store-dispatcher.drv