diff --git a/nixos/system/users.nix b/nixos/system/users.nix
index 1ecd6d6..e96fcd8 100644
--- a/nixos/system/users.nix
+++ b/nixos/system/users.nix
@@ -71,5 +71,5 @@ in {
 
   users.users = rootUser.users.users // ironmagmaUser.users.users // {};
   home-manager.users = rootUser.home-manager.users;
-  home-manager.backupFileExtension = "backup";
+  home-manager.backupFileExtension = "hm-backup";
 }