these 2 derivations will be built:
  /nix/store/0kbvbz0gs6l446qs7ww24z037iiyzai3-nix-grpc-store-0.2.2.drv
  /nix/store/pjbkf13v5d68x9nn6qrclr1wds917hnp-nix-grpc-store-exit-stress.drv