use nexus module

modules/graphical/nexus.nix

@@ -0,0 +1,8 @@
+{ inputs, ... }: {
+  imports = [ inputs.nexus.nixosModules.default ];
+
+  programs.nexus = {
+    enable = true;
+    enableNotifications = true;
+  };
+}

modules/graphical/packages.nix

@@ -1,4 +1,4 @@
-{ pkgs, inputs, ... }:
+{ pkgs, ... }:
 {
   services.xserver.excludePackages = [ pkgs.xterm ];
   environment.systemPackages = with pkgs; [
@@ -11,6 +11,5 @@
     wl-clipboard
     google-cursor
     papirus-icon-theme
-    inputs.nexus.packages.${pkgs.stdenv.hostPlatform.system}.default
   ];
 }