diff --git a/etc/default.nix b/etc/default.nix
index 9f2056f679f..3a4e2bdecac 100644
--- a/etc/default.nix
+++ b/etc/default.nix
@@ -261,7 +261,7 @@ import ../helpers/make-etc.nix {
   # unixODBC drivers (this solution is not perfect.. Because the user has to
   # ask the admin to add a driver.. but it's an easy solution which works)
   ++ (let inis = config.environment.unixODBCDrivers pkgs;
-      in optional ((pkgs.lib.traceWhatis inis) != [] ) {
+      in optional (inis != [] ) {
         source = pkgs.writeText "odbcinst.ini" (pkgs.lib.concatStringsSep "\n" inis);
         target = "odbcinst.ini";
       })