diff --git a/hosts/othalan/default.nix b/hosts/othalan/default.nix
index 2ae977c..e8f4fdb 100644
--- a/hosts/othalan/default.nix
+++ b/hosts/othalan/default.nix
@@ -12,15 +12,18 @@
     virtualization
 
     restic
-
-    # langs
-    misc
-    nim
-    node
-    tex
   ];
+
   services.vpn.enable = true;
 
+  languages = {
+    misc.enable = true;
+    python.enable = true;
+    nim.enable = true;
+    tex.enable = true;
+    node.enable = true;
+  };
+
 
   services.restic.backups.gdrive = {
     user = "daylin";
diff --git a/lib/default.nix b/lib/default.nix
index 8c33717..9b06872 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -13,6 +13,7 @@ in rec {
     nixosSystem {
       system = "x86_64-linux";
       modules =
+        [ ../modules/roles/common.nix ] ++
         builtins.filter isNixFile (listFilesRecursive (../. + "/hosts/${hostname}"));
       specialArgs = {inherit inputs;};
     };
diff --git a/modules/langs/misc.nix b/modules/langs/misc.nix
index 03c2e96..9366a0f 100644
--- a/modules/langs/misc.nix
+++ b/modules/langs/misc.nix
@@ -1,12 +1,14 @@
+{config, lib,pkgs,...}:
+let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.languages.misc;
+in
 {
-  inputs,
-  pkgs,
-  ...
-}: {
+  options.languages.misc.enable = mkEnableOption "go + rustup";
+  config = mkIf cfg.enable {
   environment.systemPackages = with pkgs; [
-    # language supports
-    nodejs
     go
     rustup
   ];
+};
 }
diff --git a/modules/langs/nim.nix b/modules/langs/nim.nix
index 7d1b693..f1cffae 100644
--- a/modules/langs/nim.nix
+++ b/modules/langs/nim.nix
@@ -1,8 +1,11 @@
+{nixpkgs,config, lib,pkgs,...}:
+let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.languages.nim;
+in
 {
-  pkgs,
-  nixpkgs,
-  ...
-}: {
+  options.languages.nim.enable = mkEnableOption "nim";
+  config = mkIf cfg.enable {
   nixpkgs.overlays = [
     # (import ../../overlays/nim {})
     (import ../../overlays/nimlsp {})
@@ -16,4 +19,5 @@
     nimble
     nimlsp
   ];
+};
 }
diff --git a/modules/langs/node.nix b/modules/langs/node.nix
index 30a14fb..61b9043 100644
--- a/modules/langs/node.nix
+++ b/modules/langs/node.nix
@@ -1,6 +1,14 @@
-{pkgs, ...}: {
+{config, lib,pkgs,...}:
+let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.languages.node;
+in
+{
+  options.languages.node.enable = mkEnableOption "node";
+  config = mkIf cfg.enable {
   environment.systemPackages = with pkgs; [
-    nodejs
+        nodejs
     nodePackages.pnpm
   ];
+};
 }
diff --git a/modules/langs/python.nix b/modules/langs/python.nix
index 148c42f..01c82a6 100644
--- a/modules/langs/python.nix
+++ b/modules/langs/python.nix
@@ -1,4 +1,12 @@
-{pkgs, ...}: {
+{config, lib,pkgs,...}:
+let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.languages.python;
+in
+{
+  options.languages.python.enable = mkEnableOption "python";
+  config = mkIf cfg.enable {
+
   environment.systemPackages = with pkgs; [
     # https://github.com/Mic92/nix-ld?tab=readme-ov-file#my-pythonnodejsrubyinterpreter-libraries-do-not-find-the-libraries-configured-by-nix-ld
     (pkgs.writeShellScriptBin "python" ''
@@ -14,4 +22,6 @@
     (python3.withPackages (ps: with ps; [pip]))
     micromamba
   ];
+
+};
 }
diff --git a/modules/langs/tex.nix b/modules/langs/tex.nix
index 9559aa5..d16b499 100644
--- a/modules/langs/tex.nix
+++ b/modules/langs/tex.nix
@@ -1,9 +1,13 @@
+{config, lib,pkgs,...}:
+let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.languages.tex;
+in
 {
-  inputs,
-  pkgs,
-  ...
-}: {
+  options.languages.tex.enable = mkEnableOption "tex";
+  config = mkIf cfg.enable {
   environment.systemPackages = with pkgs; [
     texlive.combined.scheme-full
   ];
+};
 }
diff --git a/modules/roles/common.nix b/modules/roles/common.nix
index 036e776..bcc6c3d 100644
--- a/modules/roles/common.nix
+++ b/modules/roles/common.nix
@@ -7,5 +7,9 @@
 
     # langs
     python
+    misc
+    node
+    tex
+    nim
   ];
 }
diff --git a/modules/roles/desktop.nix b/modules/roles/desktop.nix
index 3276918..bf185a2 100644
--- a/modules/roles/desktop.nix
+++ b/modules/roles/desktop.nix
@@ -5,10 +5,8 @@
   ...
 }: {
   imports = with inputs.self.nixosModules; [
-    common
     gui
     vscode
     vpn
-    # qtile
   ];
 }