diff --git a/src/Package/Extension/zlib.php b/src/Package/Extension/zlib.php
new file mode 100644
index 00000000..14ab656d
--- /dev/null
+++ b/src/Package/Extension/zlib.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Package\Extension;
+
+use Package\Target\php;
+use StaticPHP\Attribute\Package\CustomPhpConfigureArg;
+use StaticPHP\Attribute\Package\Extension;
+use StaticPHP\Package\PackageBuilder;
+
+#[Extension('zlib')]
+class zlib
+{
+    #[CustomPhpConfigureArg('Darwin')]
+    #[CustomPhpConfigureArg('Linux')]
+    public function unixConfigureArg(PackageBuilder $builder): string
+    {
+        $zlib_dir = php::getPHPVersionID() >= 80400 ? '' : ' --with-zlib-dir=' . $builder->getBuildRootPath();
+        return '--with-zlib' . $zlib_dir;
+    }
+}