Install yasnippet

nix/config/emacs/init.el

@@ -681,5 +681,10 @@
   (setq whitespace-line-column nil
         whitespace-style '(face empty tabs lines-tail trailing)))
 
+(use-package yasnippet
+  :defer t
+  :config
+  (yas-global-mode))
+
 (provide 'init)
 ;;; init.el ends here

nix/module/home-manager.nix

@@ -155,6 +155,7 @@
         modus-themes
         nix-mode
         vertico
+        yasnippet
       ]);
       package = pkgs.emacs29;
     };