diff --git a/slapos/grid/utils.py b/slapos/grid/utils.py
index dd50926771cc66aa3cb8af267b236f54ebb3c375..b88dbe704fcabf759265d3e84b92d0cabb784bfc 100644
--- a/slapos/grid/utils.py
+++ b/slapos/grid/utils.py
@@ -59,6 +59,7 @@ PYTHON_ENVIRONMENT_REMOVE_LIST = [
 ]
 
 SYSTEM_ENVIRONMENT_REMOVE_LIST = [
+  'CONFIG_SITE',
   'ENV',
   'LOGNAME',
   'TEMP',