diff --git a/frontend/runtimeSetup.js b/frontend/runtimeSetup.js
index 6f86d2c..e656e4b 100644
--- a/frontend/runtimeSetup.js
+++ b/frontend/runtimeSetup.js
@@ -39,7 +39,8 @@ function updateIndexHtml(envFileName, basePath) {
 
   // Replace any existing env script with the new one
   const envScriptRegex = /<script src="[^"]*env(\.\w+)?\.js"[^>]*><\/script>/;
-  const newEnvScript = `<script src="${envFileName}"></script>`;
+  const scriptSrc = basePath ? `${basePath.endsWith("/") ? basePath : basePath + "/"}${envFileName}` : envFileName;
+  const newEnvScript = `<script src="${scriptSrc}"></script>`;
 
   if (envScriptRegex.test(indexContent)) {
     indexContent = indexContent.replace(envScriptRegex, newEnvScript);
@@ -53,7 +54,7 @@ function updateIndexHtml(envFileName, basePath) {
   }
 
   fs.writeFileSync(indexPath, indexContent, "utf8");
-  console.log(`Updated ${indexPath} with base path: ${basePath || "/"} and env script: ${envFileName}`);
+  console.log(`Updated ${indexPath} with base path: ${basePath || "/"} and env script: ${scriptSrc}`);
 }
 
 function cleanupOldEnvFiles(newEnvFileName) {