diff --git a/vlib/v/builder/rebuilding.v b/vlib/v/builder/rebuilding.v
index ee8aac0c1f..c2f13547d1 100644
--- a/vlib/v/builder/rebuilding.v
+++ b/vlib/v/builder/rebuilding.v
@@ -211,7 +211,7 @@ fn (mut b Builder) handle_usecache(vexe string) {
 			// strconv is already imported inside builtin, so skip generating its object file
 			// TODO: incase we have other modules with the same name, make sure they are vlib
 			// is this even doign anything?
-			if imp in ['strconv', 'strings', 'dlmalloc'] {
+			if util.module_is_builtin(imp) {
 				continue
 			}
 			if imp in built_modules {
diff --git a/vlib/v/util/util.v b/vlib/v/util/util.v
index 0178ef749d..12e0372348 100644
--- a/vlib/v/util/util.v
+++ b/vlib/v/util/util.v
@@ -37,12 +37,8 @@ const (
 	]
 )
 
-const builtin_module_names = ['builtin', 'strconv', 'strings', 'dlmalloc', 'math']
-
 pub fn module_is_builtin(mod string) bool {
-	// NOTE: using util.builtin_module_parts here breaks -usecache on macos
-	return mod in util.builtin_module_names
-	// return mod in util.builtin_module_parts
+	return mod in util.builtin_module_parts
 }
 
 pub fn tabs(n int) string {