diff --git a/vaccaria.nix b/vaccaria.nix
index 546c555..d0977cf 100644
--- a/vaccaria.nix
+++ b/vaccaria.nix
@@ -4,7 +4,6 @@
   imports =
     [
       ./common-headless.nix
-      ./mastus/backup.nix
     ];
 
   boot.loader.grub.enable = true;
@@ -67,6 +66,7 @@
   environment.systemPackages = with pkgs; [
     transmission
     samba
+    rdiff-backup
   ];
 
 
@@ -105,4 +105,8 @@
     };
   };
 
+  users.extraUsers.gebner.openssh.authorizedKeys.keys = [
+    ''command="rdiff-backup --server --restrict-read-only /",no-port-forwarding,no-X11-forwarding,no-pty ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCiZhy9mm9sUeomfe9Vj5JhNE4l7YOkj7Yiii5Ni2RzUyj/dc9pxvNJSI+om/ruwb1n2gIYi0bOpwrZGiyvrUrpiqLcOwU6IOYLxnQ3E9nHLX3rsGMIyJtMcoBOcTY/rJMogqA4m6uMaaPEaeBlS5F/qb5UGIvQ7YlW1rF75RJ/QXrdL3Y7R3OJbG90QGR5EThs/1HOEBUKgkEcPQDodzNvZ8hFtznWrCw5bMSQYGMfY4WBc1b7UdLaYZ6vghQgsZ5IyvFDvCNTHTfhObYhv71YMXDkocAyI8XecNP1hoJ67oZ1xn06LEUEMiuXIQ4Ss7RYZLzNc2yrd5RYqCdd4x1n backups@aruanus''
+  ];
+
 }