diff --git a/config/ext.json b/config/ext.json
index b9fc28a5..0dca824b 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -455,7 +455,8 @@
     },
     "opcache": {
         "type": "builtin",
-        "arg-type-unix": "custom"
+        "arg-type-unix": "custom",
+        "zend-extension": true
     },
     "openssl": {
         "notes": true,
@@ -952,7 +953,8 @@
             "Darwin": "partial",
             "Linux": "partial"
         },
-        "notes": true
+        "notes": true,
+        "zend-extension": true
     },
     "xhprof": {
         "support": {
diff --git a/src/SPC/builder/Extension.php b/src/SPC/builder/Extension.php
index 6fd8b52f..22c35d33 100644
--- a/src/SPC/builder/Extension.php
+++ b/src/SPC/builder/Extension.php
@@ -226,7 +226,7 @@ class Extension
         $ret = '';
         foreach ($order as $ext) {
             if ($ext instanceof Extension && $ext->isBuildShared()) {
-                if ($ext->isZendExtension()) {
+                if (Config::getExt($ext->getName(), 'zend_extension', false) === true) {
                     $ret .= " -d \"zend_extension={$ext->getName()}\"";
                 } else {
                     $ret .= " -d \"extension={$ext->getName()}\"";
@@ -448,11 +448,6 @@ class Extension
         }
     }
 
-    protected function isZendExtension(): bool
-    {
-        return false;
-    }
-
     private function getLibraryDependencies(bool $recursive = false): array
     {
         $ret = array_filter($this->dependencies, fn ($x) => $x instanceof LibraryBase);
diff --git a/src/SPC/builder/extension/opcache.php b/src/SPC/builder/extension/opcache.php
index 865bf487..5d9dda0a 100644
--- a/src/SPC/builder/extension/opcache.php
+++ b/src/SPC/builder/extension/opcache.php
@@ -51,9 +51,4 @@ class opcache extends Extension
     {
         return 'Zend Opcache';
     }
-
-    protected function isZendExtension(): bool
-    {
-        return true;
-    }
 }
diff --git a/src/SPC/builder/extension/xdebug.php b/src/SPC/builder/extension/xdebug.php
deleted file mode 100644
index cdfeea8c..00000000
--- a/src/SPC/builder/extension/xdebug.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace SPC\builder\extension;
-
-use SPC\builder\Extension;
-use SPC\util\CustomExt;
-
-#[CustomExt('xdebug')]
-class xdebug extends Extension
-{
-    protected function isZendExtension(): bool
-    {
-        return true;
-    }
-}