these 2 derivations will be built:
  /nix/store/9r523y87flgz7d02zn128426mf30swnq-nix-grpc-store-0.1.0.drv
  /nix/store/0amgr4mlyq832wxb9fvks064wvqd9x0h-nix-grpc-store-exit-stress.drv