these 2 derivations will be built:
  /nix/store/gvj6kpcmsj2mv63fzix6c9q7cvrgizsj-nix-grpc-store-0.2.3.drv
  /nix/store/7aav64mvfms7cgiprscdffv1hp2h9k2j-nix-grpc-store-exit-stress.drv