From 4aa2c4286469b61f39797a7e12e47f6e37cc44c8 Mon Sep 17 00:00:00 2001
From: Julius Michaelis <gitter@liftm.de>
Date: Fri, 23 Jan 2026 13:52:47 +0900
Subject: [PATCH] osmctools: fix build

Closes #482921
---
 pkgs/by-name/os/osmctools/package.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/by-name/os/osmctools/package.nix b/pkgs/by-name/os/osmctools/package.nix
index c40175e388ae..116f0fdfbfe4 100644
--- a/pkgs/by-name/os/osmctools/package.nix
+++ b/pkgs/by-name/os/osmctools/package.nix
@@ -20,6 +20,9 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [ zlib ];
 
+  # Fix build with gcc15 (-std=gnu23)
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isGNU "-std=gnu17";
+
   meta = {
     description = "Command line tools for transforming Open Street Map files";
     homepage = [