diff --git a/config/prod/domaindata.php b/config/prod/domaindata.php
index 078f598..d10eb38 100644
--- a/config/prod/domaindata.php
+++ b/config/prod/domaindata.php
@@ -1,9 +1,18 @@
 <?php
 declare(strict_types=1);
 
-require_once dirname(__DIR__) . '/domainbase.php';
+$domainBaseCandidates = [
+    __DIR__ . '/domainbase.php',
+    dirname(__DIR__) . '/domainbase.php',
+];
+
+foreach ($domainBaseCandidates as $candidate) {
+    if (is_file($candidate)) {
+        require_once $candidate;
+        break;
+    }
+}
 
 if (!defined('APP_DOMAIN_NAME')) {
     define('APP_DOMAIN_NAME', APP_DOMAIN_BASE);
 }
-
diff --git a/config/staging/config.php b/config/staging/config.php
index 3395fc1..aedfc2c 100755
--- a/config/staging/config.php
+++ b/config/staging/config.php
@@ -13,6 +13,10 @@ if (!defined('ASSET_VERSION')) {
     define('ASSET_VERSION', time()); // oder deine aktuelle Version
 }
 
+if (!defined('APP_STAGE_PREFIX')) {
+    define('APP_STAGE_PREFIX', 'staging');
+}
+
 // Domain-Konfiguration (kann pro Umgebung angepasst werden)
 if (!defined('APP_DOMAIN_PRIMARY')) {
     define('APP_DOMAIN_PRIMARY', APP_STAGE_PREFIX . '.' . APP_DOMAIN_NAME);
diff --git a/config/staging/domaindata.php b/config/staging/domaindata.php
index fdedf6e..abe88d4 100644
--- a/config/staging/domaindata.php
+++ b/config/staging/domaindata.php
@@ -1,7 +1,17 @@
 <?php
 declare(strict_types=1);
 
-require_once dirname(__DIR__) . '/domainbase.php';
+$domainBaseCandidates = [
+    __DIR__ . '/domainbase.php',
+    dirname(__DIR__) . '/domainbase.php',
+];
+
+foreach ($domainBaseCandidates as $candidate) {
+    if (is_file($candidate)) {
+        require_once $candidate;
+        break;
+    }
+}
 
 if (!defined('APP_DOMAIN_NAME')) {
     define('APP_DOMAIN_NAME', APP_DOMAIN_BASE);
@@ -10,4 +20,3 @@ if (!defined('APP_DOMAIN_NAME')) {
 if (!defined('APP_STAGE_PREFIX')) {
     define('APP_STAGE_PREFIX', 'staging');
 }
-