these 2 derivations will be built:
  /nix/store/q4isjqqgbpabp2439fcwznxfpcryh2kl-nix-grpc-store-0.1.0.drv
  /nix/store/zmsxmvhima88n30w34amnq9zci41fyw2-nix-grpc-store-exit-stress.drv