diff --git a/factory/build_confs.py b/factory/build_confs.py
index 6e0f6bc..044f6ff 100644
--- a/factory/build_confs.py
+++ b/factory/build_confs.py
@@ -2,7 +2,7 @@
 
 import re
 import time
-import os
+
 
 # confs names in template/ and ../
 # except sr_head and sr_foot
@@ -82,4 +82,4 @@ for conf_name in confs_names:
     for mark in marks:
         template = template.replace('{{'+mark+'}}', values[mark])
 
-    file_output.write(template)
+    file_output.write(template)
\ No newline at end of file