these 2 derivations will be built:
  /nix/store/z0zyj3hpljfz9072bklwp623lj54l40w-nix-grpc-store-0.2.0.drv
  /nix/store/fmw296ax2p7lavzz76h334iv7qx0ba9p-nix-grpc-store-exit-stress.drv