From 0b304744b80c6f5146c8a074f41316d94adc92ec Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Mon, 25 May 2026 23:10:29 -0400
Subject: [PATCH] stdenv/problems: make handlerForProblem more performant with
 partial application

---
 pkgs/stdenv/generic/problems.nix | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/pkgs/stdenv/generic/problems.nix b/pkgs/stdenv/generic/problems.nix
index 0d0260ef6afc..ea4703954a30 100644
--- a/pkgs/stdenv/generic/problems.nix
+++ b/pkgs/stdenv/generic/problems.nix
@@ -437,20 +437,21 @@ rec {
           kind: name: pname:
           switch
         else
-          kind: name: pname:
+          kind:
           let
-            switch' = switch.kindSpecific.${kind} or switch.kindFallback;
+            kindSwitch = switch.kindSpecific.${kind} or switch.kindFallback;
           in
-          if isString switch' then
-            switch'
+          if isString kindSwitch then
+            name: pname: kindSwitch
           else
+            name:
             let
-              switch'' = switch'.nameSpecific.${name} or switch'.nameFallback;
+              nameSwitch = kindSwitch.nameSpecific.${name} or kindSwitch.nameFallback;
             in
-            if isString switch'' then
-              switch''
+            if isString nameSwitch then
+              pname: nameSwitch
             else
-              switch''.packageSpecific.${pname} or switch''.packageFallback;
+              pname: nameSwitch.packageSpecific.${pname} or nameSwitch.packageFallback;
     };
 
   genCheckProblems =