- `output` (string) - The manifest will be written to this file. This defaults to `packer-manifest.json`. - `strip_path` (bool) - Write only filename without the path to the manifest file. This defaults to false. - `strip_time` (bool) - Don't write the `build_time` field from the output. - `custom_data` (map[string]string) - Arbitrary data to add to the manifest. This is a [template engine](https://packer.io/docs/templates/engine.html). Therefore, you may use user variables and template functions in this field.