these 2 derivations will be built:
  /nix/store/85hqrfyykqz2qd9aim6935prr7969j1p-nix-grpc-store-0.1.0.drv
  /nix/store/a6ry75z7jw9jd4d2dwa8wcdjn992s1bz-nix-grpc-store-exit-stress.drv