diff --git a/nix/home/default.nix b/nix/home/default.nix
index 16dd998..20984c2 100644
--- a/nix/home/default.nix
+++ b/nix/home/default.nix
@@ -24,6 +24,8 @@ in
     # The home.packages option allows you to install Nix packages into your
     # environment.
     home.packages = with pkgs; [
+      comma # Comma runs software without installing it
+      nixd # Nix language server
       nixpkgs-fmt # Nix code formatter
     ];
   };
diff --git a/nvim/lua/plugins/lspconfig.lua b/nvim/lua/plugins/lspconfig.lua
index bba4664..313b183 100644
--- a/nvim/lua/plugins/lspconfig.lua
+++ b/nvim/lua/plugins/lspconfig.lua
@@ -21,9 +21,32 @@ return {
       html = {},
       jsonls = {},
       lua_ls = {},
+      nixd = {},
       svelte = {},
       tsserver = {},
       yamlls = {},
     },
   },
+  setup = function()
+    local nvim_lsp = require("lspconfig")
+    nvim_lsp.nixd.setup({
+      cmd = { "nixd" },
+      setttings = {
+        nixd = {
+          expr = "import <nixpkgs> { }",
+        },
+        formattting = {
+          command = { "nixpkgs-fmt" },
+        },
+        options = {
+          nixos = {
+            expr = '(builtins.getFlake ("git+file://" + toString ./.)).nixosConfigurations.k-on.options',
+          },
+          home_manager = {
+            expr = '(builtins.getFlake ("git+file://" + toString ./.)).homeConfigurations."ruixi@k-on".options',
+          },
+        },
+      },
+    })
+  end,
 }