diff --git a/nix/docker/default.nix b/nix/docker/default.nix
index 98edeb160..6b3eb2268 100644
--- a/nix/docker/default.nix
+++ b/nix/docker/default.nix
@@ -38,6 +38,7 @@ let
       # just for manual testing within the pod, may be removef for production?
       curl wget netcat openldap 
       unixtools.netstat htop gnugrep
+      locale
     ] ++ optionals isDemo [ postgresql_12 memcached uniworx.uniworx.components.exes.uniworxdb ];
 
     runAsRoot = ''