def make_target_file_name_from_source(source_file_name):
    """
    Make a file name for the changed project file name from the original project file name.

    Args:
        source_file_name: The file name of the project originally read.

    Returns:
        The project file name with a `.997` suffix inserted before the `.ifrac` suffix.
    """
    return ''.join([source_file_name.stem, '.997', source_file_name.suffix])