Attempt to fix module

nix/module.nix

@@ -5,9 +5,10 @@
   ...
 }:
 let
+  cfg = config.labmon;
   settingsFormat = pkgs.format.toml { };
 
-  settingsFile = settingsFormat.generate "labmon.toml" config.labmon.settings;
+  settingsFile = settingsFormat.generate "labmon.toml" cfg.labmon.settings;
 in
 {
   options.labmon = {
@@ -21,6 +22,7 @@ in
     };
   };
 
+  config = lib.mkIf cfg.enable {
     systemd.services.labmon = {
       wantedBy = [ "multi-user.target" ];
       after = [ "network.target" ];
@@ -62,4 +64,5 @@ in
         ];
       };
     };
+  };
 }