diff --git a/configuration.nix b/configuration.nix
index bd1464d..3b9f270 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -55,13 +55,20 @@
     };
   };
 
-  #services.cron = {
-  #  enable = true;
-  #  systemCronJobs = [
-  #    "0 20 * * 1 root /root/reassert-nas-permissions.sh"
-  #    "0  0 * * 1 tvb  . /etc/profile; /home/tvb/gitea-backup"
-  #  ];
-  #};
+  services.cron = {
+    enable = true;
+    systemCronJobs =
+      let
+        reassertPerms = pkgs.writeShellScript "reassert-nas-permissions.sh" ''
+          ${pkgs.coreutils}/bin/chown -v -R tvb:nas /nas
+          ${pkgs.findutils}/bin/find /nas -type d -exec ${pkgs.coreutils}/bin/chmod -v 750 {} \;
+          ${pkgs.findutils}/bin/find /nas -type f -exec ${pkgs.coreutils}/bin/chmod -v 640 {} \;
+        '';
+      in [
+        "0 20 * * 1 root ${reassertPerms}"
+        "0  0 * * 1 tvb  . /etc/profile; /home/tvb/gitea-backup"
+      ];
+  };
 
   services.openssh = {
     enable = true;