diff --git a/RoboFile.php b/RoboFile.php
index 0f68fbf49b..20077bf3a9 100644
--- a/RoboFile.php
+++ b/RoboFile.php
@@ -79,7 +79,7 @@ class RoboFile extends \Robo\Tasks {
 
   function compileJs($opts = ['env' => null]) {
     $env = ($opts['env']) ?
-      sprintf('NODE_ENV="%s"', $opts['env']) :
+      sprintf('./node_modules/cross-env/dist/bin/cross-env.js NODE_ENV="%s"', $opts['env']) :
       null;
     return $this->_exec($env . ' ./node_modules/webpack/bin/webpack.js --bail');
   }
diff --git a/package.json b/package.json
index d4baebcb35..4cf9672d1c 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,7 @@
     "babel-core": "^5.8.22",
     "babel-loader": "^5.3.2",
     "clean-webpack-plugin": "^0.1.16",
+    "cross-env": "^5.0.1",
     "chai": "2.2.0",
     "chai-jq": "0.0.8",
     "eslint": "^3.19.0",