From f3e3433a513f342215653b47d527bcaa309da70c Mon Sep 17 00:00:00 2001
From: Artur Sannikov <git-sign@asannikov.com>
Date: Thu, 26 Mar 2026 11:30:17 +0200
Subject: [PATCH] raxml: fix build with gcc15

---
 pkgs/by-name/ra/raxml/package.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/by-name/ra/raxml/package.nix b/pkgs/by-name/ra/raxml/package.nix
index 7527e858d3dd..8343082baa34 100644
--- a/pkgs/by-name/ra/raxml/package.nix
+++ b/pkgs/by-name/ra/raxml/package.nix
@@ -30,6 +30,9 @@ stdenv.mkDerivation (finalAttrs: {
         make -f Makefile.SSE3.PTHREADS.gcc
       '';
 
+  # Fix build with gcc15 (-std=gnu23)
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isGNU "-std=gnu17";
+
   installPhase =
     if useMpi then
       ''