From 0fb0ae355282ad62cd0516f7041ab24bea814b91 Mon Sep 17 00:00:00 2001
From: Gaetan Lepage <gaetan@glepage.com>
Date: Sun, 15 Feb 2026 20:11:06 +0100
Subject: [PATCH] trivial-builders: fix evaluation when entries is empty

---
 pkgs/build-support/trivial-builders/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/build-support/trivial-builders/default.nix b/pkgs/build-support/trivial-builders/default.nix
index 7a73baea2388..c62df4ca9fba 100644
--- a/pkgs/build-support/trivial-builders/default.nix
+++ b/pkgs/build-support/trivial-builders/default.nix
@@ -687,7 +687,7 @@ rec {
         # This is the best we can do since the other attrs are either defined here, or curried values that
         # we cannot extract a position from
         pos =
-          if lib.isAttrs entries then
+          if (lib.isAttrs entries) && (entries != { }) then
             builtins.unsafeGetAttrPos (builtins.head (builtins.attrNames entries)) entries
           else
             null;