these 2 derivations will be built:
  /nix/store/k829hcbvbcwihczvpzmcm3n4m9g0d5qd-nix-grpc-store-0.2.3.drv
  /nix/store/980s7l8qk5jpn3b9jddiiym2badbxi9f-nix-grpc-store-dispatcher.drv