diff --git a/packages/cli/src/gemini.tsx b/packages/cli/src/gemini.tsx
index b226d8d5..35201c1d 100644
--- a/packages/cli/src/gemini.tsx
+++ b/packages/cli/src/gemini.tsx
@@ -133,7 +133,9 @@ ${reason.stack}`
 }
 
 export async function main() {
-  console.log("gemini --output 'startup'");
+  if (!process.env['SANDBOX']) {
+    console.log("gemini --output 'startup'");
+  }
   setupUnhandledRejectionHandler();
   const workspaceRoot = process.cwd();
   const settings = loadSettings(workspaceRoot);