diff --git a/lib/compiler.js b/lib/compiler.js
index 159c366a..75c3da0f 100644
--- a/lib/compiler.js
+++ b/lib/compiler.js
@@ -135,6 +135,9 @@ function buildEnvCommandLineParams(config, envData, $logger) {
     const args = [];
     envFlagNames.map(item => {
         let envValue = envData[item];
+        if (typeof envValue === "undefined") {
+            return;
+        }
         if (typeof envValue === "boolean") {
             if (envValue) {
                 args.push(`--env.${item}`);