diff --git a/fixtures/packaging/webpack-alias/config.js b/fixtures/packaging/webpack-alias/config.js
index 26812b8129..c480c7ddab 100644
--- a/fixtures/packaging/webpack-alias/config.js
+++ b/fixtures/packaging/webpack-alias/config.js
@@ -1,10 +1,12 @@
+var path = require('path');
+
 module.exports = {
   entry: './input',
   output: {
     filename: 'output.js',
   },
   resolve: {
-    root: '../../../build/packages',
+    root: path.resolve('../../../build/packages'),
     alias: {
       'react': 'react/dist/react-with-addons',
       'react-dom': 'react-dom/dist/react-dom',
diff --git a/fixtures/packaging/webpack/config.js b/fixtures/packaging/webpack/config.js
index 000a686487..e895e84850 100644
--- a/fixtures/packaging/webpack/config.js
+++ b/fixtures/packaging/webpack/config.js
@@ -1,9 +1,11 @@
+var path = require('path');
+
 module.exports = {
   entry: './input',
   output: {
     filename: 'output.js',
   },
   resolve: {
-    root: '../../../build/packages/',
+    root: path.resolve('../../../build/packages/'),
   },
 };