diff --git a/webpack.config.base.js b/webpack.config.base.js
index 3b383aeb..7db0683b 100644
--- a/webpack.config.base.js
+++ b/webpack.config.base.js
@@ -14,7 +14,7 @@ const webpack = require('webpack');
 const VERSION = childProcess.execSync('git rev-parse --short HEAD').toString();
 const isProduction = process.env.NODE_ENV === 'production';
 const isTest = process.env.NODE_ENV === 'test';
-const isRelease = process.env.CIRCLE_BRANCH && process.env.CIRCLE_BRANCH.startsWith('release-');
+const isRelease = process.env.GITHUB_WORKFLOW && process.env.GITHUB_WORKFLOW.startsWith('release');
 
 const codeDefinitions = {
     __HASH_VERSION__: !isRelease && JSON.stringify(VERSION),