1 files changed, 4 insertions, 0 deletions
diff --git a/flake.nix b/flake.nix
index 9a3087c4b..440320afa 100644
--- a/flake.nix
+++ b/flake.nix
@@ -283,6 +283,10 @@
               "address"
               "undefined"
             ];
+            # it is very hard to make *every* CI build use this option such
+            # that we don't wind up building Lix twice, so we do it here where
+            # we are already doing so.
+            werror = true;
           };
 
           # Make sure that nix-env still produces the exact same result