diff --git a/mixins.yml b/mixins.yml
index d02931b3ed4a282a85a89d20016762a7e4f559e9..c8c029d34c16baa98eefba39535a52ec8bff1795 100644
--- a/mixins.yml
+++ b/mixins.yml
@@ -34,6 +34,8 @@ stages:
     - composer config --no-plugins --no-interaction allow-plugins.php-http/discovery false
     # Allow PHPStan Extension Installer
     - composer config --no-plugins --no-interaction allow-plugins.phpstan/extension-installer true
+    # Allow Composer Installer Extender
+    - composer config --no-plugins --no-interaction allow-plugins.oomphinc/composer-installers-extender true
     # Allow Drupal Dependency Quality Gate Composer Audit plugin
     - if [[ "$IGNORE_COMPOSER_EXTENDED_AUDIT" == "0" ]]; then composer config --no-plugins --no-interaction allow-plugins.mxr576/ddqg-composer-audit true; fi
     # Disallow Drupal Dependency Quality Gate Composer Audit plugin