diff --git a/nix/core.nix b/nix/core.nix
index 83812ea..bcf5e70 100644
--- a/nix/core.nix
+++ b/nix/core.nix
@@ -39,9 +39,11 @@
     dive
     ctop
     bottom
+    tailscale
 
     # Nodejs
     nodejs_20
+    deno
 
     # Golang
     go
diff --git a/nvim/lua/code_helpers.lua b/nvim/lua/code_helpers.lua
index e58042f..ce033aa 100644
--- a/nvim/lua/code_helpers.lua
+++ b/nvim/lua/code_helpers.lua
@@ -134,7 +134,7 @@ require("mason-lspconfig").setup({
 		"bashls", -- bash
 		"bufls", -- buf
 		"cssls", -- css
-		-- "denols", -- deno
+		"denols", -- deno
 		"dockerls", -- docker
 		"docker_compose_language_service", -- docker-compose
 		"eslint", -- eslint
@@ -162,6 +162,24 @@ require("mason-lspconfig").setup({
 
 require("mason-lspconfig").setup_handlers({
 	function(server_name)
+		-- DenoLSP and TSServer should not be run
+		-- at the same time.
+		-- https://docs.deno.com/runtime/manual/getting_started/setup_your_environment#neovim-06-using-the-built-in-language-server
+		if server_name == "denols" then
+			require("lspconfig")[server_name].setup({
+				capabilities = require("cmp_nvim_lsp").default_capabilities(),
+				root_dir = require("lspconfig.util").root_pattern("deno.json", "deno.jsonc"),
+			})
+			return
+		end
+		if server_name == "tsserver" then
+			require("lspconfig")[server_name].setup({
+				capabilities = require("cmp_nvim_lsp").default_capabilities(),
+				root_dir = require("lspconfig.util").root_pattern("package.json"),
+				single_file_support = false,
+			})
+			return
+		end
 		require("lspconfig")[server_name].setup({
 			capabilities = require("cmp_nvim_lsp").default_capabilities(),
 		})
diff --git a/switch.sh b/switch.sh
index 65ed2f0..83f5bdd 100755
--- a/switch.sh
+++ b/switch.sh
@@ -1,7 +1,7 @@
 #!/bin/env bash
 
 source common.sh
-echo_header "== DotFiles with GUI: $GUI and ENV: $ENVIRONMENT"
+echo_header "== DotFiles with ENV: $ENVIRONMENT"
 
 echo_header "==[host] Installing Home Manager packages"
 workspace_link nix/home.nix .config/home-manager/home.nix