From 707263e1ba56a9ff03c7cfedf59bf41f3baf8f16 Mon Sep 17 00:00:00 2001
From: "Shahar \"Dawn\" Or" <mightyiampresence@gmail.com>
Date: Fri, 14 Aug 2026 23:53:28 +0700
Subject: [PATCH] lib.isFunction: no error on non-function __functor

---
 lib/trivial.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/trivial.nix b/lib/trivial.nix
index 9288a9e1b1db..f333440ee384 100644
--- a/lib/trivial.nix
+++ b/lib/trivial.nix
@@ -1128,7 +1128,7 @@ in
     let
       isFunction = builtins.isFunction;
     in
-    f: isFunction f || (f ? __functor && isFunction (f.__functor f));
+    f: isFunction f || (f ? __functor && isFunction f.__functor && isFunction (f.__functor f));
 
   /**
     `mirrorFunctionArgs f g` creates a new function `g'` with the same behavior as `g` (`g' x == g x`)