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..3e43b0d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -4,35 +4,36 @@
       "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"
       }
@@ -42,6 +43,21 @@
         "home-manager": "home-manager",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "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"
+      }
     }
   },
   "root": "root",
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/i3/default.nix b/home-manager/i3/default.nix
index 3e3e5ff..0924db1 100644
--- a/home-manager/i3/default.nix
+++ b/home-manager/i3/default.nix
@@ -75,11 +75,7 @@ in
         { command = "element-desktop"; notification = false; }
         { command = "keepassxc"; notification = false; }
         { command = "nextcloud"; notification = false; }
-        { command = "signal-desktop"; notification = false; }
-        { command = "slack"; notification = false; }
-        { command = "telegram-desktop"; notification = false; }
         { command = "thunderbird"; notification = false; }
-        { command = "whatsapp-for-linux"; notification = false; }
       ];
 
       assigns = {
diff --git a/home-manager/i3/workspaces/workspace-2.json b/home-manager/i3/workspaces/workspace-2.json
index ee18d46..a6d29f3 100644
--- a/home-manager/i3/workspaces/workspace-2.json
+++ b/home-manager/i3/workspaces/workspace-2.json
@@ -1,54 +1,10 @@
 // vim:ts=4:sw=4:et
 {
-    "layout": "tabbed",
-    "type": "con",
-    "nodes": [
-        {
-            "name": "Telegram",
-            "swallows": [
-               {
-               "class": "^TelegramDesktop$"
-               }
-            ],
-            "type": "con"
-        },
-        {
-            "name": "Signal",
-            "swallows": [
-               {
-               "class": "^Signal$"
-               }
-            ],
-            "type": "con"
-        },
-        {
-            "name": "Element",
-            "swallows": [
-               {
-               "class": "^Element$"
-               }
-            ],
-            "type": "con"
-        },
-        {
-            "name": "Whatsapp",
-            "swallows": [
-               {
-               "class": "^Whatsapp-for-linux$"
-               }
-            ],
-            "type": "con"
-        }
-    ]
+  "name": "Element",
+  "swallows": [
+    {
+      "class": "^Element$"
+    }
+  ],
+  "type": "con"
 }
-
-{
-    "name": "Slack",
-    "swallows": [
-       {
-       "class": "^Slack$"
-       }
-    ],
-    "type": "con"
-}
-
diff --git a/home-manager/i3/workspaces/workspace-4.json b/home-manager/i3/workspaces/workspace-4.json
index b41470b..108f590 100644
--- a/home-manager/i3/workspaces/workspace-4.json
+++ b/home-manager/i3/workspaces/workspace-4.json
@@ -3,7 +3,7 @@
   "name": "Email",
   "swallows": [
     {
-      "class": "^Thunderbird$"
+      "class": "^thunderbird$"
     }
   ],
   "type": "con"
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