in src/main/java/org/apache/sling/installer/provider/installhook/OsgiInstallerHookEntry.java [34:43]
    public void execute(InstallContext context) throws PackageException {
        try {
            Class<?> osgiInstallerClass = getClass().getClassLoader().loadClass(OSGI_INSTALLER_CLASSNAME);
            LOG.debug("Osgi Installer Class found: {}", osgiInstallerClass);
            loadAndRunInstallHook(context);
        } catch (ClassNotFoundException e) {
            LOG.info("Class {} not found, skipping installer hook for package {}", OSGI_INSTALLER_CLASSNAME, context.getPackage().getId());
        }
    }