diff --git a/src/SPC/builder/extension/iconv.php b/src/SPC/builder/extension/iconv.php
index 6e2df2e5..e3178144 100644
--- a/src/SPC/builder/extension/iconv.php
+++ b/src/SPC/builder/extension/iconv.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace SPC\builder\extension;
 
 use SPC\builder\Extension;
+use SPC\builder\macos\MacOSBuilder;
 use SPC\util\CustomExt;
 
 #[CustomExt('iconv')]
@@ -13,6 +14,9 @@ class iconv extends Extension
     public function patchBeforeConfigure(): bool
     {
         // macOS need to link iconv dynamically, we add it to extra-libs
+        if (!$this->builder instanceof MacOSBuilder) {
+            return false;
+        }
         $extra_libs = $this->builder->getOption('extra-libs', '');
         if (!str_contains($extra_libs, '-liconv')) {
             $extra_libs .= ' -liconv';