these 2 derivations will be built:
  /nix/store/k4lw4i8ain0v8hnvih11jansd9bmk2kf-nix-grpc-store-0.2.3.drv
  /nix/store/kbqcxbafqarna8w9ll6cp45kmd85rwxw-nix-grpc-store-dispatcher.drv