make alacritty option

modules/alacritty.nix

@@ -1,6 +1,14 @@
 { config, pkgs, lib, ... }:
+let
+  cfg = config.sconfig.alacritty;
+in
 {
-  config = {
+  options.sconfig.alacritty.enable = lib.mkEnableOption "Enable Alacritty";
+
+  config = lib.mkIf cfg.enable {
+
+    environment.systemPackages = [ pkgs.alacritty ];
+
     programs.bash.interactiveShellInit = ''
       function _set_title() {
         printf "\033]0;%s@%s:%s\007" "''${USER}" "''${HOSTNAME%%.*}" "''${PWD/#$HOME/\~}"

modules/desktop.nix

@@ -9,6 +9,8 @@ in
     programs.ssh.startAgent = true;
     programs.ssh.agentPKCS11Whitelist = pkcslib;
 
+    sconfig.alacritty.enable = true;
+
     nixpkgs.overlays = [
       (self: super: {
         gnome = super.gnome // {

modules/i3/default.nix

@@ -68,7 +68,6 @@ in
 
     environment.systemPackages = with pkgs; [
       unstable.i3status-rust # 21.11 version supports zfs ARC
-      alacritty
       brightnessctl
       numix-icon-theme
       yaru-theme