diff --git a/flake.nix b/flake.nix
index 63e7c5c..e5748bd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -89,6 +89,7 @@
             home-manager.useUserPackages = true;
             home-manager.users.akill = import ./home/home.nix;
             home-manager.extraSpecialArgs = {inherit inputs system;};
+            home-manager.backupFileExtension = "home_backup";
           }
           peerix.nixosModules.peerix
           {