these 2 derivations will be built:
  /nix/store/rhhls40wcdjzqbhxly1yy3qhrbnv2yic-nix-grpc-store-0.1.0.drv
  /nix/store/4q3v8qb3ax4dq3wmgxwsdvv1hxizfcvn-nix-grpc-store-exit-stress.drv