diff --git a/flake.nix b/flake.nix
index a5348a3..9746dec 100644
--- a/flake.nix
+++ b/flake.nix
@@ -51,6 +51,7 @@
         home-manager = {
           useUserPackages = true;
           useGlobalPkgs = true;
+          backupFileExtension = "backup";
           sharedModules = [ plasma-manager.homeManagerModules.plasma-manager ];
         };