these 2 derivations will be built:
  /nix/store/j9q0jslbksqi0fl2cvd2r852kwpja8yk-nix-grpc-store-0.1.0.drv
  /nix/store/q1kpxhnn9l44q71isbxwgm0wkjz12p0d-nix-grpc-store-exit-stress.drv