these 2 derivations will be built:
  /nix/store/7aqay4yi1axhzy71ni0nig750r1wdn0z-nix-grpc-store-0.2.2.drv
  /nix/store/d0sswjy2lvgdavcbyi1zg3zw9z12fvcl-nix-grpc-store-exit-stress.drv