diff --git a/flake.lock b/flake.lock
index 2a79d9b..ca32395 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1697410455,
-        "narHash": "sha256-jCs/ffIP3tUPN7HWWuae4BB8+haAw2NI02z5BQvWMGM=",
+        "lastModified": 1701433070,
+        "narHash": "sha256-Gf9JStfENaUQ7YWFz3V7x/srIwr4nlnVteqaAxtwpgM=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "78125bc681d12364cb65524eaa887354134053d0",
+        "rev": "4a8545f5e737a6338814a4676dc8e18c7f43fc57",
         "type": "github"
       },
       "original": {
@@ -22,16 +22,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1697059129,
-        "narHash": "sha256-9NJcFF9CEYPvHJ5ckE8kvINvI84SZZ87PvqMbH6pro0=",
+        "lastModified": 1701389149,
+        "narHash": "sha256-rU1suTIEd5DGCaAXKW6yHoCfR1mnYjOXQFOaH7M23js=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5e4c2ada4fcd54b99d56d7bd62f384511a7e2593",
+        "rev": "5de0b32be6e85dc1a9404c75131316e4ffbc634c",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "nixos-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index ccc57a7..8802e33 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,7 +7,7 @@
   # };
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
     home-manager.url = "github:nix-community/home-manager";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
   };
diff --git a/home/default.nix b/home/default.nix
index 2730cd6..31d9a42 100644
--- a/home/default.nix
+++ b/home/default.nix
@@ -92,6 +92,8 @@
     gimp
     godot_4
     inkscape
+    imagemagick
+    ghostscript
     scrcpy
 
     # web
diff --git a/home/nvim/lsp.vim b/home/nvim/lsp.vim
index 4cf28bd..e6cdc93 100644
--- a/home/nvim/lsp.vim
+++ b/home/nvim/lsp.vim
@@ -14,7 +14,7 @@ lua <<EOF
       ['<C-p>'] = cmp.mapping.select_prev_item(),
       ['<C-n>'] = cmp.mapping.select_next_item(),
       ['<C-g>'] = cmp.mapping.abort(),
-      ['<Tab>'] = cmp.mapping.confirm({ select = true }),
+      -- ['<Tab>'] = cmp.mapping.confirm({ select = true }),
       ['<Cr>'] = cmp.mapping.confirm({ select = false }),
     },
     sources = cmp.config.sources({
@@ -53,6 +53,7 @@ lua <<EOF
   local on_attach = function(_, _)
     vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, {})
     vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, {})
+    vim.keymap.set('n', '<leader>f', vim.lsp.buf.format, {})
     vim.keymap.set('n', 'gd', vim.lsp.buf.definition, {})
     vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, {})
     vim.keymap.set('n', 'gr', vim.lsp.buf.references, {})
diff --git a/system/default.nix b/system/default.nix
index 42f9331..8a005a7 100644
--- a/system/default.nix
+++ b/system/default.nix
@@ -21,7 +21,7 @@
 
   time.timeZone = "Europe/Berlin";
   i18n.extraLocaleSettings = {
-    LC_TIME = "de_DE.UTF-8";
+    LC_TIME = "en_GB.UTF-8";
     LC_CTYPE = "de_DE.UTF-8";
     LC_PAPER = "de_DE.UTF-8";
   };