diff --git a/configuration.nix b/configuration.nix
index 112ee04..8c8c7be 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -115,7 +115,7 @@
       keep-derivations = true
     '';
 
-    autoOptimiseStore = true;
+    settings.auto-optimise-store = true;
     gc = {
       automatic = true;
       dates = "weekly";
diff --git a/flake.lock b/flake.lock
index 9467c3b..934f96b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -4,35 +4,68 @@
       "inputs": {
         "nixpkgs": [
           "nixpkgs"
-        ]
+        ],
+        "utils": "utils"
       },
       "locked": {
-        "lastModified": 1667907331,
-        "narHash": "sha256-bHkAwkYlBjkupPUFcQjimNS8gxWSWjOTevEuwdnp5m0=",
+        "lastModified": 1670253003,
+        "narHash": "sha256-/tJIy4+FbsQyslq1ipyicZ2psOEd8dvl4OJ9lfisjd0=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "6639e3a837fc5deb6f99554072789724997bc8e5",
+        "rev": "0e8125916b420e41bf0d23a0aa33fadd0328beb3",
         "type": "github"
       },
       "original": {
         "owner": "nix-community",
-        "ref": "release-22.05",
+        "ref": "release-22.11",
         "repo": "home-manager",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1669152211,
-        "narHash": "sha256-mBLiTNTzrtlYPHF0bL8NeGA4n8K5b35fYVdqaTIIkgc=",
+        "lastModified": 1670276674,
+        "narHash": "sha256-FqZ7b2RpoHQ/jlG6JPcCNmG/DoUPCIvyaropUDFhF3Q=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "56ca700ceabcfa15396bcf581a1296e8e27ad677",
+        "rev": "52e3e80afff4b16ccb7c52e9f0f5220552f03d04",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-22.05",
+        "ref": "nixos-22.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1670146390,
+        "narHash": "sha256-XrEoDpuloRHHbUkbPnhF2bQ0uwHllXq3NHxtuVe/QK4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "86370507cb20c905800527539fc049a2bf09c667",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "release-22.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1670086663,
+        "narHash": "sha256-hT8C8AQB74tdoCPwz4nlJypLMD7GI2F5q+vn+VE/qQk=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "813836d64fa57285d108f0dbf2356457ccd304e3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -40,7 +73,42 @@
     "root": {
       "inputs": {
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "sops-nix": "sops-nix"
+      }
+    },
+    "sops-nix": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-stable": "nixpkgs-stable"
+      },
+      "locked": {
+        "lastModified": 1670149631,
+        "narHash": "sha256-rwmtlxx45PvOeZNP51wql/cWjY3rqzIR3Oj2Y+V7jM0=",
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "rev": "da98a111623101c64474a14983d83dad8f09f93d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index fd62266..ac3bb43 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,9 +1,9 @@
 {
   inputs = {
-    nixpkgs.url = github:NixOS/nixpkgs/nixos-22.05;
+    nixpkgs.url = github:NixOS/nixpkgs/nixos-22.11;
 
     home-manager = {
-      url = github:nix-community/home-manager/release-22.05;
+      url = github:nix-community/home-manager/release-22.11;
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
diff --git a/home-manager/neovim/default.nix b/home-manager/neovim/default.nix
index 49fd5f9..733cc8a 100644
--- a/home-manager/neovim/default.nix
+++ b/home-manager/neovim/default.nix
@@ -75,7 +75,7 @@ in
         project-nvim
         auto-session
 
-        nvim-treesitter
+        nvim-treesitter.withAllGrammars
         markdown-preview-nvim # use({ "iamcco/markdown-preview.nvim", run = ":call mkdp#util#install()" })
         toggleterm-nvim
         nvim-notify
@@ -120,7 +120,7 @@ in
         nvim-lspconfig
         lsp-status-nvim
         rust-tools-nvim
-        lua-dev-nvim
+        neodev-nvim
         null-ls-nvim
         lsp_lines-nvim
 
diff --git a/home-manager/neovim/lspconfig.lua b/home-manager/neovim/lspconfig.lua
index 3c77588..f2a45d8 100644
--- a/home-manager/neovim/lspconfig.lua
+++ b/home-manager/neovim/lspconfig.lua
@@ -32,7 +32,7 @@ local on_attach = function(client, bufnr)
             group = augroup,
             buffer = bufnr,
             callback = function()
-                vim.lsp.buf.formatting_sync(nil, 3000)
+                vim.lsp.buf.format({ timeout_ms = 3000, async = false })
             end,
         })
     end
@@ -49,8 +49,17 @@ lsp_status.config({
 })
 lsp_status.register_progress()
 
-local capabilities = vim.tbl_extend("keep", vim.lsp.protocol.make_client_capabilities(), lsp_status.capabilities)
-capabilities = require("cmp_nvim_lsp").update_capabilities(capabilities)
+-- setup lua language server for init.nvim and nvim plugin development
+require("neodev").setup({
+    override = function(root_dir, library)
+        if require("neodev.util").has_file(root_dir, "/etc/nixos") then
+            library.enabled = true
+            library.plugins = true
+        end
+    end,
+})
+
+local capabilities = require("cmp_nvim_lsp").default_capabilities(lsp_status.capabilities)
 
 local servers = {
     ["bashls"] = {},
@@ -66,6 +75,7 @@ local servers = {
     },
     ["pyright"] = {},
     ["rnix"] = {},
+    ["sumneko_lua"] = {},
     ["terraformls"] = {},
     ["tflint"] = {},
     ["tsserver"] = {},
diff --git a/home-manager/neovim/treesitter.lua b/home-manager/neovim/treesitter.lua
index 8c259f9..a061730 100644
--- a/home-manager/neovim/treesitter.lua
+++ b/home-manager/neovim/treesitter.lua
@@ -1,10 +1,4 @@
 require('nvim-treesitter.configs').setup({
-    ensure_installed = {
-        "bash", "c", "cpp", "css", "dockerfile", "hcl", "html", "javascript",
-        "json", "latex", "lua", "markdown", "nix", "python", "rust", "svelte",
-        "toml", "tsx", "typescript", "vim", "vue", "yaml"
-    },
-    auto_install = true,
     highlight = {
         enable = true,
         additional_vim_regex_highlighting = false