From 47e958cd9a67c7f46baacfae62df1a7ce4f5bde3 Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Wed, 3 Jun 2026 18:12:36 -0400
Subject: [PATCH] lib.modules: inline mergedType into a lower scope

This will only be used if `res ? type` (which is barely ever true, since
there's typically only ever one decl). We can avoid the thunk in every
case.
---
 lib/modules.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/modules.nix b/lib/modules.nix
index c53cd8185e91..474040c270df 100644
--- a/lib/modules.nix
+++ b/lib/modules.nix
@@ -1043,10 +1043,11 @@ let
       (
         res: opt:
         let
-          mergedType = res.type.typeMerge opt.options.type.functor;
-
           typeSet =
             if opt.options ? type && res ? type then
+              let
+                mergedType = res.type.typeMerge opt.options.type.functor;
+              in
               if mergedType != null then
                 {
                   type = mergedType;