diff --git a/ops/nixos/lib/fup.nix b/ops/nixos/lib/fup.nix
index cf8c35c71e..44d4fa0b88 100644
--- a/ops/nixos/lib/fup.nix
+++ b/ops/nixos/lib/fup.nix
@@ -1,9 +1,12 @@
-{ config, options, depot, lib, ... }:
+{ config, options, depot, lib, pkgs, ... }:
 
 let
   inherit (depot.ops) secrets;
   sock = "/run/fup.sock";
   pkg = depot.web.fup;
+
+  format = pkgs.formats.yaml {};
+  fupConfig = format.generate "fup.yaml" secrets.fup.config;
 in
 {
   options = with lib; {
@@ -69,7 +72,7 @@ in
         Type = "simple";
         Restart = "always";
         EnvironmentFile = secrets.fup.environment;
-        ExecStart = "${pkg}/bin/fup serve --listen=systemd --root=https://p.lukegb.com/ --bucket-url=s3://public-lukegb-fup?endpoint=objdump.zxcvbnm.ninja&region=london";
+        ExecStart = "${pkg}/bin/fup serve --config=${fupConfig}";
         DynamicUser = true;
       };
     };