diff --git a/agent/src/agent.rs b/agent/src/agent.rs
index 77de006..1bf983c 100644
--- a/agent/src/agent.rs
+++ b/agent/src/agent.rs
@@ -478,7 +478,8 @@ impl Agent {
             .output()
             .await?;
 
-        let is_failed = String::from_utf8_lossy(&result.stdout).trim();
+        let output_string = String::from_utf8_lossy(&result.stdout);
+        let is_failed = output_string.trim();
         if is_failed == "failed" {
             return Err(anyhow::anyhow!("cm-rebuild service failed"));
         }