diff --git a/buildbox/script.go b/buildbox/script.go
index 04d355e8a9..761f56a8c5 100644
--- a/buildbox/script.go
+++ b/buildbox/script.go
@@ -78,6 +78,8 @@ func RunScript(dir string, script string, env []string, callback func(Process))
     _, err = io.Copy(&buffer, pty)
     if err != nil {
       Logger.Errorf("io.Copy failed with error: %T: %v", err, err)
+    } else {
+      Logger.Debug("io.Copy finsihed")
     }
 
     w.Done()
@@ -97,6 +99,8 @@ func RunScript(dir string, script string, env []string, callback func(Process))
       time.Sleep(1000 * time.Millisecond)
     }
 
+    Logger.Debug("Finished routine that copies the buffer to the process output")
+
     w.Done()
   }()