diff --git a/BUCK b/BUCK
index 9a0e72c2ba..5c95fcc09b 100644
--- a/BUCK
+++ b/BUCK
@@ -466,7 +466,7 @@ apple_binary(
     linker_flags = [
         "-e",
         "_WKExtensionMain",
-        "-l", "-force_load", "WKExtensionMainLegacy",
+        "-l", "-force_load", "/usr/lib/libWKExtensionMainLegacy.a",
     ],
     configs = watch_extension_binary_configs(),
     frameworks = [