these 2 derivations will be built:
  /nix/store/dm3llphyyk39wmf2xd6pdync49dsw8l0-nix-grpc-store-0.2.3.drv
  /nix/store/0d7lj6bybkbwdz0lkc3vwz88g7i0ymw5-nix-grpc-store-exit-stress.drv