diff --git a/sky/build/sdk_xcode_harness/Tools/common/BuildFlutterApp b/sky/build/sdk_xcode_harness/Tools/common/BuildFlutterApp
index 8d7a113a06a89a41bed7bac1f44efea787baab2e..29a4fdd9fe7c0233acb05be162c16b8ce93f90ce 100644
--- a/sky/build/sdk_xcode_harness/Tools/common/BuildFlutterApp
+++ b/sky/build/sdk_xcode_harness/Tools/common/BuildFlutterApp
@@ -64,7 +64,7 @@ BuildApp() {
       exit -1
     fi
   else
-    RunCommand touch ${derived_dir}/app.so
+    RunCommand eval "$(echo \"static const int Moo = 88;\" | xcrun clang -x c --shared -o ${derived_dir}/app.so -)"
   fi
 
   local precompilation_flag=""