From af2b34f170504d48e8ff5c78dfe9d174e4af19a8 Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Thu, 19 Feb 2026 19:21:59 +0100
Subject: [PATCH] readline: move CFLAGS into env for structuredAttrs

---
 pkgs/development/libraries/readline/8.3.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/readline/8.3.nix b/pkgs/development/libraries/readline/8.3.nix
index bc28262304fd..f32bf7c36a59 100644
--- a/pkgs/development/libraries/readline/8.3.nix
+++ b/pkgs/development/libraries/readline/8.3.nix
@@ -83,7 +83,12 @@ stdenv.mkDerivation (finalAttrs: {
   #
   # Method borrowed from
   # https://github.com/msys2/MINGW-packages/commit/35830ab27e5ed35c2a8d486961ab607109f5af50
-  CFLAGS = lib.optionalString stdenv.hostPlatform.isMinGW "-D__USE_MINGW_ALARM -D_POSIX";
+  env = lib.optionalAttrs stdenv.hostPlatform.isMinGW {
+    CFLAGS = toString [
+      "-D__USE_MINGW_ALARM"
+      "-D_POSIX"
+    ];
+  };
 
   # This install error is caused by a very old libtool. We can't autoreconfHook this package,
   # so this is the best we've got!