diff --git a/src/config/index.ts b/src/config/index.ts
index ca43c219..6a6df7fc 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -147,17 +147,22 @@ type ConfigUtils = {
 export type Config<T> = T & ConfigUtils;
 
 export function withConfigUtils<T extends Hash = Hash>(path: string | null, config: T): Config<T> {
-    return {
-        ...config,
-        resolve: (subpath: string): AbsolutePath => {
-            if (path === null) {
-                return resolve(subpath) as AbsolutePath;
-            }
-
-            return resolve(dirname(path), subpath) as AbsolutePath;
+    return Object.create(config, {
+        resolve: {
+            enumerable: false,
+            value: (subpath: string): AbsolutePath => {
+                if (path === null) {
+                    return resolve(subpath) as AbsolutePath;
+                }
+
+                return resolve(dirname(path), subpath) as AbsolutePath;
+            },
         },
-        [configPath]: path === null ? path : resolve(path),
-    };
+        [configPath]: {
+            enumerable: false,
+            value: path === null ? path : resolve(path),
+        }
+    });
 }
 
 export async function resolveConfig<T extends Hash = {}>(