diff --git a/hook/build.dart b/hook/build.dart
index 4c89389..067ccba 100644
--- a/hook/build.dart
+++ b/hook/build.dart
@@ -48,7 +48,8 @@ Future<void> main(List<String> args) => build(args, (input, output) async {
       break;
     case OS.macOS:
       libFileName = "libgomuks.dylib";
-      extraEnv = {"SDKROOT": await getXCodeTool()};
+
+      extraEnv = {"CC": await getXCodeTool(findTool: "clang")};
       break;
     case OS.windows:
       libFileName = "libgomuks.dll";