these 2 derivations will be built:
  /nix/store/9apdkr88rx34j4951dxs36iy4smqsl76-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/vqymj09xm8gm8adz2q5zsp71256spifm-nix-grpc-store-exit-stress.drv