diff --git a/lib/pipeline/pipeline.js b/lib/pipeline/pipeline.js
index a1368d1b7..53dda9afb 100644
--- a/lib/pipeline/pipeline.js
+++ b/lib/pipeline/pipeline.js
@@ -86,13 +86,13 @@ class Pipeline {
       function runWebpack(next) {
         self.logger.info(__(`running webpack with '${self.webpackConfigName}' config...`));
         const assets = Object.keys(self.assetFiles)
-          .filter(key => key.match(/\.js?$/));
-        assets.forEach(key => {
-          self.logger.info(__("writing file") + " " + (utils.joinPath(self.buildDir, key)).bold.dim);
-        });
+          .filter(key => key.match(/\.js$/));
         if (!assets || !assets.length) {
           return next();
         }
+        assets.forEach(key => {
+          self.logger.info(__("writing file") + " " + (utils.joinPath(self.buildDir, key)).bold.dim);
+        });
         let built = false;
         const webpackProcess = new ProcessLauncher({
           modulePath: utils.joinPath(__dirname, 'webpackProcess.js'),
@@ -120,7 +120,7 @@ class Pipeline {
         async.eachOf(
           // assetFileWrite should not process .js files
           Object.keys(self.assetFiles)
-            .filter(key => !key.match(/\.js?$/))
+            .filter(key => !key.match(/\.js$/))
             .reduce((obj, key) => {
               obj[key] = self.assetFiles[key];
               return obj;