diff --git a/hosts/hetzner-arm/profiles/photoprism.nix b/hosts/hetzner-arm/profiles/photoprism.nix
index b276c28..aa31da2 100644
--- a/hosts/hetzner-arm/profiles/photoprism.nix
+++ b/hosts/hetzner-arm/profiles/photoprism.nix
@@ -25,7 +25,7 @@
       --log-level=INFO "$@"
   '';
 
-  inherit (lib.modules) mkMerge mkForce;
+  inherit (lib.modules) mkForce;
   inherit (builtins) toFile;
 in {
   environment.systemPackages = with pkgs; [
@@ -89,7 +89,7 @@ in {
   };
 
   systemd.services.photoprism.serviceConfig = {
-    DynamicUser = false;
+    DynamicUser = mkForce false;
     ReadWritePaths = [ "/Photos" ];
   };