these 2 derivations will be built:
  /nix/store/gx47rzwrpfhldqx4drqmb41ny8cxy6hw-nix-grpc-store-0.2.0.drv
  /nix/store/v1l9mi26r1drhvdsir1gk9rc14wbhn7i-nix-grpc-store-exit-stress.drv