diff --git a/flake.nix b/flake.nix
index 2033192..f9e21dd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -29,6 +29,7 @@
           {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
+            home-manager.backupFileExtension = "backup";
             home-manager.extraSpecialArgs = { inherit inputs; };
             home-manager.users.jet = import ./home.nix;
           }