From f707cb7ff67cf48f6b21f1c37ae2856f86b3c2ad Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Thu, 19 Feb 2026 19:20:42 +0100
Subject: [PATCH] ncurses*: move CFLAGS into env for structuredAttrs

---
 pkgs/development/libraries/ncurses/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/ncurses/default.nix b/pkgs/development/libraries/ncurses/default.nix
index 798be764047c..1161d2dafd5c 100644
--- a/pkgs/development/libraries/ncurses/default.nix
+++ b/pkgs/development/libraries/ncurses/default.nix
@@ -123,7 +123,9 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # Only the C compiler, and explicitly not C++ compiler needs this flag on solaris:
-  CFLAGS = lib.optionalString stdenv.hostPlatform.isSunOS "-D_XOPEN_SOURCE_EXTENDED";
+  env = lib.optionalAttrs stdenv.hostPlatform.isSunOS {
+    CFLAGS = "-D_XOPEN_SOURCE_EXTENDED";
+  };
 
   strictDeps = true;