these 2 derivations will be built:
  /nix/store/z0f9z8cwp09dw7g9l1p39pppc36sz25z-nix-grpc-store-0.2.2.drv
  /nix/store/8hjixsp0lfd0jkr888affhyik53a3yhj-nix-grpc-store-exit-stress.drv