diff --git a/users/youwen/common/core.nix b/users/youwen/common/core.nix
index b2103c4..06c7557 100755
--- a/users/youwen/common/core.nix
+++ b/users/youwen/common/core.nix
@@ -76,19 +76,8 @@
   programs.fish = {
     enable = true;
     shellAliases = {
-      rebuild = "sudo nixos-rebuild switch";
       ls = "eza -l --icons=auto";
     };
-    functions = {
-      update-nixos = {
-        description = "Update the system flake and attempt to build and switch to the new configuration.";
-        body = ''
-          cd /etc/nixos
-          nix flake update
-          sudo nixos-rebuild switch
-        '';
-      };
-    };
     interactiveShellInit = ''
       fish_vi_key_bindings
       set -g fish_greeting