From 0cce43fce4fc95cceb94ba1da9f1609022411cd1 Mon Sep 17 00:00:00 2001
From: Lan Tian <xuyh0120@outlook.com>
Date: Tue, 27 Jan 2026 00:16:33 -0800
Subject: [PATCH] Replace builtins.warn with lib.warn to support Nix < 2.23
 (Fix #27)

---
 flake.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flake.nix b/flake.nix
index 0714dc7..943bc98 100644
--- a/flake.nix
+++ b/flake.nix
@@ -80,7 +80,7 @@
         flake = {
           overlay = self.overlays.pinned;
           overlays.default =
-            builtins.warn
+            lib.warn
               "\"nix-cachyos-kernel.overlays.default\" may cause kernel/patch version mismatch and build failure. Please use \"nix-cachyos-kernel.overlays.pinned\" instead."
               (
                 final: prev: {