From 1b95cb72a2117089142a800e25cfd58a2b9650af Mon Sep 17 00:00:00 2001
From: Jamie Magee <jamie.magee@gmail.com>
Date: Sat, 7 Mar 2026 16:39:16 -0800
Subject: [PATCH] _2bwm: fix build with GCC 15

Pass -std=gnu17 to work around incompatible-pointer-types errors.
The upstream code declares callback functions with empty parameter
lists, which GCC 15 (defaulting to gnu23) now rejects.

Ref: #475479
---
 pkgs/applications/window-managers/2bwm/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/applications/window-managers/2bwm/default.nix b/pkgs/applications/window-managers/2bwm/default.nix
index 3b2053fdca26..cedbe5710a8c 100644
--- a/pkgs/applications/window-managers/2bwm/default.nix
+++ b/pkgs/applications/window-managers/2bwm/default.nix
@@ -25,6 +25,8 @@ stdenv.mkDerivation rec {
   # Allow users set their own list of patches
   inherit patches;
 
+  env.NIX_CFLAGS_COMPILE = "-std=gnu17";
+
   buildInputs = [
     libxcb
     libxcb-keysyms