diff --git a/server/src/services/native-runtime/native-session-executor.ts b/server/src/services/native-runtime/native-session-executor.ts
index 66cc820ba21..7bfe19a9adc 100644
--- a/server/src/services/native-runtime/native-session-executor.ts
+++ b/server/src/services/native-runtime/native-session-executor.ts
@@ -12237,7 +12237,7 @@ async function createRunnerdBackendWithinSessionClaim(
           timeoutMs: 180_000,
         });
         if (installResult.exitCode !== 0 || installResult.timedOut) {
-          throw new Error("runner_remote_codex_install_failed");
+          throw new Error(`runner_remote_codex_install_failed exitCode=${installResult.exitCode} timedOut=${installResult.timedOut}: ${redactSensitiveText(installResult.stderr).slice(-2_000).trim()}`);
         }
       }
       await measureNativeRunnerSpan(