diff --git a/home/neovim/default.nix b/home/neovim/default.nix
index 360d0cb..29d8887 100644
--- a/home/neovim/default.nix
+++ b/home/neovim/default.nix
@@ -27,7 +27,6 @@
       rustfmt # Rust formatter
       shfmt # Shell, Bash etc.
       nixfmt-rfc-style
-      stylua
 
       # Misc
       ripgrep
@@ -36,14 +35,6 @@
       nodejs_22
       clang
       tree-sitter
-
-      # R
-      (rWrapper.override {
-        packages = with rPackages; [
-          styler
-          languageserver
-        ];
-      })
     ];
   };
 }
diff --git a/hosts/marr/configuration.nix b/hosts/marr/configuration.nix
index f828ae2..0328f4e 100644
--- a/hosts/marr/configuration.nix
+++ b/hosts/marr/configuration.nix
@@ -32,9 +32,6 @@ in
   hardware.bluetooth.powerOnBoot = true;
   hardware.opengl.enable = true;
 
-  # Set your time zone.
-  time.timeZone = "Asia/Seoul";
-
   # Configure keymap in X11
   services.xserver.xkb = {
     layout = "fr";
diff --git a/modules/networking.nix b/modules/networking.nix
index 5683098..484e77c 100644
--- a/modules/networking.nix
+++ b/modules/networking.nix
@@ -1,12 +1,8 @@
 { ... }:
 {
   networking = {
-    wireless.iwd.enable = true;
 
-    networkmanager = {
-      enable = true;
-      wifi.backend = "iwd";
-    };
+    networkmanager.enable = true;
 
     firewall =
       let