diff --git a/modules/server/nftables/default.nix b/modules/server/nftables/default.nix
index ec69152..6783406 100644
--- a/modules/server/nftables/default.nix
+++ b/modules/server/nftables/default.nix
@@ -2,7 +2,7 @@
 let
  cfg = config.syscfg.server;
 in {
-  config = mkIf (cfg.ipfw.enable) {
+  config = lib.mkIf (cfg.ipfw.enable) {
     boot.kernel.sysctl = {
       "net.ipv4.ip_forward" = 1;
       "net.ipv6.conf.all.forwarding" = 1;