Update index.md

docs/drupal/index.md

@@ -15,10 +15,18 @@ If `composer` is properly installed, then these example commands will add latest
 
 ```
 cd /var/www/d10.example.org
+composer config extra.enable-patching true
 composer require civicrm/civicrm-{core,packages,drupal-8}
 composer require civicrm/cli-tools
 ```
 
+??? info "More detail: Enable patching"
+
+    A handful of packages used by CiviCRM require extra patch-files.
+
+    This is possible with the popular [cweagans/composer-patches](https://github.com/cweagans/composer-patches)
+    plugin. However, you must [opt-in to enable it](https://github.com/cweagans/composer-patches#allowing-patches-to-be-applied-from-dependencies).
+
 ### Install CiviCRM without any translations {#drupal10-installation}
 
 To install CiviCRM without any translations we use the command line tool `cv` and we assume you already have an empty database.