these 2 derivations will be built:
  /nix/store/ghafs1x79vmqixxvpcdvwjrqw7wqnrq8-nix-grpc-store-0.2.1.drv
  /nix/store/n271nr8m4m110dq39jwjddipxraznmdh-nix-grpc-store-exit-stress.drv