these 2 derivations will be built:
  /nix/store/hmacvhvhf8i74689ckpi010mk1vwqmiv-nix-grpc-store-0.2.2.drv
  /nix/store/fn6jrfg0xdm7qqqn80s5zinp9sgck0ha-nix-grpc-store-dispatcher.drv