diff --git a/lib/build/index.js b/lib/build/index.js
index f1b7eddf24..8be96359b1 100644
--- a/lib/build/index.js
+++ b/lib/build/index.js
@@ -20,7 +20,12 @@ const r = function () {
   if (_.last(args).includes('~')) {
     return _.last(args)
   }
-  return resolve.apply(null, arguments)
+
+  let filepath = resolve.apply(null, arguments)
+  if (/^win/.test(process.platform)) {
+    filepath = filepath.replace(/\\/g, '\\\\')
+  }
+  return filepath
 }
 
 const defaults = {