diff --git a/config/ext.json b/config/ext.json
index 359533a9..8fc641f9 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -498,7 +498,7 @@
     },
     "zlib": {
         "type": "builtin",
-        "arg-type": "with",
+        "arg-type": "custom",
         "arg-type-windows": "enable",
         "lib-depends": [
             "zlib"
diff --git a/src/SPC/builder/extension/zlib.php b/src/SPC/builder/extension/zlib.php
new file mode 100644
index 00000000..916ee3a2
--- /dev/null
+++ b/src/SPC/builder/extension/zlib.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\extension;
+
+use SPC\builder\Extension;
+use SPC\util\CustomExt;
+
+#[CustomExt('zlib')]
+class zlib extends Extension
+{
+    public function getUnixConfigureArg(): string
+    {
+        return '--with-zlib --with-zlib-dir="' . BUILD_ROOT_PATH . '"';
+    }
+}