From a35e7ea278632d431a7d92dad96598f7dfbf3767 Mon Sep 17 00:00:00 2001
From: Rafael Ieda <git@ieda.me>
Date: Thu, 23 Oct 2025 18:04:27 -0300
Subject: [PATCH] oonf-olsrd2: fix build with cmake4

---
 pkgs/by-name/oo/oonf-olsrd2/package.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/by-name/oo/oonf-olsrd2/package.nix b/pkgs/by-name/oo/oonf-olsrd2/package.nix
index 8f64185dd51b..8b5d6815d66e 100644
--- a/pkgs/by-name/oo/oonf-olsrd2/package.nix
+++ b/pkgs/by-name/oo/oonf-olsrd2/package.nix
@@ -31,6 +31,11 @@ stdenv.mkDerivation rec {
     cmake
   ];
 
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail "cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)" "cmake_minimum_required(VERSION 3.10)"
+  '';
+
   meta = with lib; {
     description = "Adhoc wireless mesh routing daemon";
     license = licenses.bsd3;