refactor!: multi-host setup

nix/modules/commonPackages.nix

@@ -0,0 +1,10 @@
+{ pkgs, lib, ... }: {
+  options = {
+    commonPackages = lib.mkOption {
+      type = lib.types.listOf lib.types.package;
+      default = [ ];
+      description = "Common packages";
+    };
+  };
+  config.commonPackages = with pkgs; [ wget busybox curl ];
+}

nix/modules/default.nix

@@ -0,0 +1 @@
+{ pkgs, lib, config, ... }: { imports = [ ./commonPackages.nix ./hm.nix ]; }

nix/modules/hm.nix

@@ -0,0 +1,11 @@
+{ lib, config, pkgs, ... }: {
+  options = { hm.enable = lib.mkEnableOption "enable home-manager"; };
+
+  config = lib.mkIf config.hm.enable {
+    home-manager.useGlobalPkgs = true;
+    home-manager.useUserPackages = true;
+    home-manager.users.luca = import ../users/luca/home.nix;
+    users.users.luca.shell = pkgs.zsh;
+    programs.zsh.enable = true;
+  };
+}