these 2 derivations will be built:
  /nix/store/7bfv0559sf2i2a87cmr14p6f907d6l0r-nix-grpc-store-0.2.3.drv
  /nix/store/8smk71h1fl3a8lp4db9rqs83cqxjhzsr-nix-grpc-store-dispatcher.drv