temp: allow litestream though insecure

modules/nixos/services/backups.nix

@@ -44,6 +44,10 @@
       settings = { };
     };
 
+    # Broken on 2024-08-23
+    # https://github.com/NixOS/nixpkgs/commit/0875d0ce1c778f344cd2377a5337a45385d6ffa0
+    nixpkgs.config.permittedInsecurePackages = [ "litestream-0.3.13" ];
+
     # Wait for secret to exist
     systemd.services.litestream = {
       after = [ "backup-secret.service" ];