improve node detection

1 files changed, 1 insertions, 1 deletions

diff --git a/src/shell.js b/src/shell.js
index d6dc0fb5..5571b8ac 100644
--- a/src/shell.js
+++ b/src/shell.js
@@ -8,7 +8,7 @@ try {
 
 // The environment setup code below is customized to use Module.
 // *** Environment setup code ***
-var ENVIRONMENT_IS_NODE = typeof process === 'object';
+var ENVIRONMENT_IS_NODE = typeof process === 'object' && typeof require === 'function';
 var ENVIRONMENT_IS_WEB = typeof window === 'object';
 var ENVIRONMENT_IS_WORKER = typeof importScripts === 'function';
 var ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE && !ENVIRONMENT_IS_WORKER;