these 2 derivations will be built:
  /nix/store/k4lw4i8ain0v8hnvih11jansd9bmk2kf-nix-grpc-store-0.2.3.drv
  /nix/store/d5vxyswsp3gjvda5wg5jhm2dp1b5mysa-nix-grpc-store-exit-stress.drv