diff --git a/lib/GeneratorContext.js b/lib/GeneratorContext.js
index 7d42feb..b1f7465 100644
--- a/lib/GeneratorContext.js
+++ b/lib/GeneratorContext.js
@@ -56,10 +56,15 @@ module.exports = class GeneratorContext {
     }
   }
 
-  npmInstall() {
-    return require('./installPackages')({
-      cwd: this.outDir
-    })
+  npmInstall(opts) {
+    return require('./installPackages')(
+      Object.assign(
+        {
+          cwd: this.outDir
+        },
+        opts
+      )
+    )
   }
 
   showProjectTips() {