diff --git a/lib/stats.nix b/lib/stats.nix
index 4a532a04..3c8deab3 100644
--- a/lib/stats.nix
+++ b/lib/stats.nix
@@ -44,7 +44,10 @@ in
       };
     };
     # Workaround for nixpkgs/master:
-    users.users.collectd.group = "collectd";
+    users.users.collectd = {
+      isSystemUser = true;
+      group = "collectd";
+    };
     users.groups.collectd = {};
 
     services.nginx = lib.mkIf config.services.nginx.enable {