diff --git a/flake.nix b/flake.nix
index 1001bc7..07fc48f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -155,6 +155,7 @@
           modules = [ 
             home-manager.nixosModules.home-manager{
               home-manager.extraSpecialArgs = specialArgs;
+              home-manager.backupFileExtension = "backup";
             }
             ./systems/jeroboam
           ];