dirname

setup/shims/index.js

@@ -4,7 +4,7 @@ module.exports = {
   name: 'shims',
   setup(build) {
     build.onResolve({ filter: /^(path|fs|os)$/ }, args => {
-      return { path: path.resolve(path.join('setup/shims', args.path + '.js')) }
+      return { path: path.resolve(path.join(__dirname, args.path + '.js')) }
     })
   }
 }