diff --git a/lib/cmd-build.js b/lib/cmd-build.js
index 8e79fd66..7c90f4a7 100644
--- a/lib/cmd-build.js
+++ b/lib/cmd-build.js
@@ -12,6 +12,8 @@ var fs = require('fs')
 var bankai = require('../')
 var utils = require('./utils')
 
+process.env.NODE_ENV = process.env.NODE_ENV || 'production'
+
 module.exports = build
 
 function build (entry, opts) {