def METHOD_NAME(self, *args, **kwargs):
    """Custom sanity check for JuliaPackage"""
    pkg_dir = os.path.join('packages', self.name)
    custom_paths = {
        'files': [],
        'dirs': [pkg_dir],
    }
    kwargs.update({'custom_paths': custom_paths})
    return ExtensionEasyBlock.METHOD_NAME(self, EXTS_FILTER_JULIA_PACKAGES, *args, **kwargs)