diff --git a/flake.nix b/flake.nix
index 4abd8f0..9705fc4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -53,6 +53,7 @@
 
               home-manager.useGlobalPkgs = true;
               home-manager.useUserPackages = true;
+              home-manager.backupFileExtension = "backup";
               home-manager.extraSpecialArgs = { inherit inputs user; };
               home-manager.users.${user} = import homeFile;
             }
diff --git a/modules/home/rsydn/base.nix b/modules/home/rsydn/base.nix
index 25c0e61..7650eb0 100644
--- a/modules/home/rsydn/base.nix
+++ b/modules/home/rsydn/base.nix
@@ -14,6 +14,18 @@
     enable = true;
     enableVimMode = true;
     powerlevel10kConfigFile = ./shell/p10k.zsh;
+    aliases = { ll = "ls -alF"; };
+    extraAfter = ''
+      function rsydn-accept-autosuggest-or-complete() {
+        if [[ -n "''${POSTDISPLAY:-}" ]]; then
+          zle autosuggest-accept
+        else
+          zle expand-or-complete
+        fi
+      }
+      zle -N rsydn-accept-autosuggest-or-complete
+      bindkey '^I' rsydn-accept-autosuggest-or-complete
+    '';
   };
 
   programs.git.enable = true;