snowhawk: dwm specialization

hosts/snowhawk/configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running `nixos-help`).
 
-{ pkgs, inputs, ... }:
+{ pkgs, inputs, lib, ... }:
 
 {
   imports = [
@@ -10,8 +10,15 @@
     ../../modules
   ];
 
+  specialisation = {
+    dwm.configuration = {
+      snowhawk.dwm.enable = true;
+
+      home-manager.sharedModules = [{ snowhawk.dunst.enable = lib.mkDefault true; }];
+    };
+  };
+
   snowhawk = {
-    dwm.enable = true;
     filesystem.enable = true;
     plymouth.enable = true;
     polkit.enable = true;