Fix tabs in nix files

init.el

@@ -34,18 +34,14 @@
       mouse-wheel-follow-mouse +1
       scroll-step 1) ;; C-n C-p scroll step
 
-;; Tabs
-(setq custom-tab-width 2)
-
 ;; Highlight matching parens faster
 (setq show-paren-delay 0)
 
+(setq tab-width 2)
 (defun disable-tabs ()
   (indent-tabs-mode -1))
 (defun enable-tabs ()
-  (local-set-key (kbd "TAB") 'tab-to-tab-stop)
-  (indent-tabs-mode +1)
-  (setq tab-width custom-tab-width))
+  (indent-tabs-mode +1))
 
 (add-hook 'prog-mode-hook 'enable-tabs)
 (add-hook 'lisp-mode-hook 'disable-tabs)
@@ -147,7 +143,9 @@
 
 ;; Nix support
 (use-package nix-mode
-  :mode "\\.nix\\'")
+  :mode "\\.nix\\'"
+  :config
+  (add-hook 'nix-mode-hook 'disable-tabs))
 
 ;; Treesitter based navigation
 (use-package evil-textobj-tree-sitter