add enable option for programs.tmux

modules/examples/lnl.nix

@@ -1,8 +1,7 @@
 { config, lib, pkgs, ... }:
 {
   environment.systemPackages =
-    [ pkgs.lnl.zsh
-      pkgs.lnl.tmux
+    [ pkgs.lnl.tmux
       pkgs.lnl.vim
 
       pkgs.curl
@@ -24,7 +23,8 @@
   system.defaults.global.InitialKeyRepeat = 10;
   system.defaults.global.KeyRepeat = 1;
 
-  programs.tmux.loginShell = "${pkgs.lnl.zsh}/bin/zsh -l";
+  programs.tmux.enable = true;
+  programs.tmux.loginShell = "${config.programs.zsh.shell} -l";
   programs.tmux.enableSensible = true;
   programs.tmux.enableMouse = true;
   programs.tmux.enableFzf = true;
@@ -38,7 +38,6 @@
   '';
 
   programs.zsh.enable = true;
-  programs.zsh.shell = "${pkgs.lnl.zsh}/bin/zsh";
 
   programs.zsh.shellInit = ''
     export NIX_PATH=nixpkgs=$HOME/.nix-defexpr/nixpkgs:darwin=$HOME/.nix-defexpr/darwin:darwin-config=$HOME/.nixpkgs/darwin-config.nix:$HOME/.nix-defexpr/channels_root
@@ -121,15 +120,6 @@
   nixpkgs.config.allowUnfree = true;
 
   nixpkgs.config.packageOverrides = self: {
-    lnl.zsh = pkgs.runCommand pkgs.zsh.name
-      { buildInputs = [ pkgs.makeWrapper ]; }
-      ''
-        source $stdenv/setup
-
-        mkdir -p $out/bin
-        makeWrapper ${pkgs.zsh}/bin/zsh $out/bin/zsh
-      '';
-
     lnl.tmux = pkgs.runCommand pkgs.tmux.name
       { buildInputs = [ pkgs.makeWrapper ]; }
       ''

modules/programs/tmux.nix

@@ -26,6 +26,14 @@ let
 in {
   options = {
 
+    programs.tmux.enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether to configure tmux.
+      '';
+    };
+
     programs.tmux.loginShell = mkOption {
       type = types.path;
       default = "$SHELL";
@@ -83,7 +91,7 @@ in {
 
   };
 
-  config = {
+  config = mkIf cfg.enable {
 
     programs.tmux.tmuxOptions.login-shell.text = if stdenv.isDarwin then ''
       set -g default-command "reattach-to-user-namespace ${cfg.loginShell}"

modules/programs/zsh.nix

@@ -64,6 +64,11 @@ in
 
   config = mkIf cfg.enable {
 
+    environment.systemPackages =
+      [ # Include zsh package
+        pkgs.zsh
+      ];
+
     environment.variables.SHELL = "${cfg.shell}";
 
     environment.etc."zshenv".text = ''