EUM-Site-Package/Configuration/TCA/Overrides/sys_template.php

<?php

/**
 * Register static TypoScript files
 */

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
    'eum_site_package',
    'Configuration/TypoScript/Base',
    'EUM site package'
);