Tell aurelia-webpack-plugin to filter the set of dependencies it auto-imports. Note that this will have no effect until the next version of aurelia-webpack-plugin is published to NPM.

templates/AureliaSpa/package.json

@@ -41,5 +41,10 @@
     "url-loader": "^0.5.7",
     "webpack": "^2.1.0-beta.25",
     "webpack-hot-middleware": "^2.10.0"
+  },
+  "aurelia": {
+    "build": {
+      "includeDependencies": "aurelia-*"
+    }
   }
 }