correct templateVars usage

lib/build.js

@@ -190,6 +190,7 @@ function * generateRoutesAndFiles () {
   ]
   this.options.store = fs.existsSync(join(this.srcDir, 'store'))
   let templateVars = {
+    nuxt: this.options,
     uniqBy: _.uniqBy,
     isDev: this.dev,
     router: {
@@ -253,11 +254,11 @@ function * generateRoutesAndFiles () {
         imports: {
           serialize,
           hash
-        },
-        options: options || {},
-        nuxt: this.options
+        }
       })
-      const content = template(templateVars)
+      const content = template(Object.assign({}, templateVars, {
+        options: options || {}
+      }))
       const path = r(this.dir, '.nuxt', dst)
       return writeFile(path, content, 'utf8')
       .then(() => {