these 2 derivations will be built:
  /nix/store/1q0865dv2zp9il9b43w6hhmwzhrsif1k-nix-grpc-store-0.2.3.drv
  /nix/store/8191hi2bgal6srnhvl9lwvlb16773b2h-nix-grpc-store-dispatcher.drv