diff --git a/dox/runner.py b/dox/runner.py
index 370e00f..f52d208 100644
--- a/dox/runner.py
+++ b/dox/runner.py
@@ -53,7 +53,7 @@ class Runner(object):
             self._run_shell_command(base_docker + list(args))
         except Exception as e:
             logger.error("docker failed")
-            logger.info(e.stderr)
+            logger.info(e)
             raise
 
     def _run_shell_command(self, cmd):