From 51a39dc7688cef25c7e4bd4ac09ecad56fd25e2f Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Thu, 7 May 2026 18:47:00 -0400
Subject: [PATCH] lib.types: use `head foo` instead of `elemAt foo 0`

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

diff --git a/lib/types.nix b/lib/types.nix
index 51e8150ba176..809b11c247c5 100644
--- a/lib/types.nix
+++ b/lib/types.nix
@@ -1565,7 +1565,7 @@ rec {
       typeMerge =
         f':
         let
-          mt1 = t1.typeMerge (elemAt f'.payload.elemType 0).functor;
+          mt1 = t1.typeMerge (head f'.payload.elemType).functor;
           mt2 = t2.typeMerge (elemAt f'.payload.elemType 1).functor;
         in
         if (name == f'.name) && (mt1 != null) && (mt2 != null) then functor.type mt1 mt2 else null;