diff --git a/lib/build/loader.js b/lib/build/loader.js
index 30b23322a..71e63d750 100644
--- a/lib/build/loader.js
+++ b/lib/build/loader.js
@@ -111,7 +111,7 @@ function shouldIncludeBundleMetadata(bundles, loaderOptions) {
 }
 
 function systemJSConfigForBundle(bundle, bundler, location, includeBundles) {
-  const buildOptions = new Configuration(bundle.config.options, bundler.buildOptions);
+  const buildOptions = new Configuration(bundle.config.options, bundler.buildOptions.getAllOptions());
   const mapTarget = location + '/' + bundle.moduleId + (buildOptions.isApplicable('rev') && bundle.hash ? '-' + bundle.hash : '') + path.extname(bundle.config.name);
   const moduleId = bundle.moduleId;
   const bundledModuleIds = bundle.getBundledModuleIds();