these 2 derivations will be built:
  /nix/store/5h5ngykp61yzq20gw0iaplis44ph9a58-nix-grpc-store-0.2.3.drv
  /nix/store/5qnkd4glbkgfp3svg9w586rbdkx8yjkp-nix-grpc-store-exit-stress.drv