these 2 derivations will be built:
  /nix/store/xg8n318g3l7bxhb33l95i40nqjq8y5az-nix-grpc-store-0.1.0.drv
  /nix/store/fi20blbh6lwid8b87v3isjrbzbfc1x54-nix-grpc-store-exit-stress.drv