Ensure component names are unique

lib/utils/webpack.config.js

@@ -134,8 +134,9 @@ module.exports = (program, directory, suppliedStage, webpackPort = 1500, pages =
         ]
       case `build-javascript`: {
         // Get array of page template component names.
-        let components = _.uniq(Array.from(pagesDB().values()).map(page => page.component))
+        let components = Array.from(pagesDB().values()).map(page => page.component)
         components = components.map(component => layoutComponentChunkName(component))
+        components = _.uniq(components)
         console.log('components', components)
         return [
           // Moment.js includes 100s of KBs of extra localization data
@@ -154,6 +155,7 @@ module.exports = (program, directory, suppliedStage, webpackPort = 1500, pages =
               `app`,
               ...components,
             ],
+            children: false,
             // The more page components there are, the higher we raise the bar
             // for merging in page-specific JS libs into the commons chunk. The
             // two principles here is a) keep the TTI (time to interaction) as

package.json

@@ -1,7 +1,7 @@
 {
   "name": "gatsby",
   "description": "React.js Static Site Generator",
-  "version": "1.0.0-alpha.test5",
+  "version": "1.0.0-alpha.test7",
   "author": "Kyle Mathews <mathews.kyle@gmail.com>",
   "ava": {
     "require": [