diff --git a/flake.nix b/flake.nix
index 3282ffd..49edaa1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -30,6 +30,7 @@
           {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
+            home-manager.backupFileExtension = "backup";
             home-manager.users.alex = import ./nixos76/alex/home.nix;
             # Optionally, use home-manager.extraSpecialArgs to pass
             # arguments to home.nix