diff --git a/extras/build-tests/nix/configs/default b/extras/build-tests/nix/configs/default
index fd66aee9e..0270d6bfc 100644
--- a/extras/build-tests/nix/configs/default
+++ b/extras/build-tests/nix/configs/default
@@ -25,5 +25,5 @@ DISABLEUSERMOD=""
 OPEROVERRIDEVERIFY=""
 DISABLEEXTBANSTACKING=""
 GENCERTIFICATE="0"
-#EXTRAPARA="--enable-werror"
+EXTRAPARA="--enable-werror"
 ADVANCED=""