these 2 derivations will be built:
  /nix/store/8gjfwyajbhy27hhrx9mimbqz57hmcfig-nix-grpc-store-0.2.0.drv
  /nix/store/2m89iajmdyil8nsklfnvlqj3nahswnsz-nix-grpc-store-exit-stress.drv