diff --git a/common.nix b/common.nix
index 5bd5ec8..71d79a9 100644
--- a/common.nix
+++ b/common.nix
@@ -323,4 +323,6 @@
     wantedBy = [ "default.target" ];
     serviceConfig.ExecStart = "${pkgs.bluez}/bin/mpris-proxy";
   };
+
+  home-manager.backupFileExtension = "backup";
 }