From 2e44c179920a7a0b975c7d3933f71e2a56bf6c2a Mon Sep 17 00:00:00 2001
From: Jared Baur <jaredbaur@fastmail.com>
Date: Fri, 9 Jan 2026 10:21:35 -0800
Subject: [PATCH] nixos/yggdrasil: ensure freeformType attrs are resolved

`lib.types.attrs` is too lenient, allowing for invalid yggdrasil
configuration to make it's way into the final config. Since this
configuration ends up in a JSON file, changing the `freeformType` to
use the type definition from `pkgs.formats.json` allows for the
configuration to resolve correctly.
---
 nixos/modules/services/networking/yggdrasil.nix | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/nixos/modules/services/networking/yggdrasil.nix b/nixos/modules/services/networking/yggdrasil.nix
index 3f2f0277f59a..5d2dc2b8cd41 100644
--- a/nixos/modules/services/networking/yggdrasil.nix
+++ b/nixos/modules/services/networking/yggdrasil.nix
@@ -13,7 +13,6 @@ let
     bool
     listOf
     str
-    attrs
     submodule
     ;
   cfg = config.services.yggdrasil;
@@ -69,7 +68,7 @@ in
 
       settings = mkOption {
         type = submodule {
-          freeformType = attrs;
+          freeformType = (pkgs.formats.json { }).type;
           options = {
             PrivateKeyPath = mkOption {
               type = nullOr path;