these 2 derivations will be built:
  /nix/store/0175ybv460vrhawi4gizpy70zvk3z1wf-nix-grpc-store-0.1.0-beta.2.drv
  /nix/store/xdpwnr7mz0nblpwm892134xljja34lp0-nix-grpc-store-dispatcher.drv