diff --git a/flake.nix b/flake.nix
index 49edaa1..5c0f427 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,6 +45,7 @@
           {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
+            home-manager.backupFileExtension = "backup";
             home-manager.users.alex = import ./nixos76/alex/home.nix;
           }
         ];