From e0da918f8f010d0a0f369b0e1bd5da6b18403040 Mon Sep 17 00:00:00 2001
From: Rafael Ieda <git@ieda.me>
Date: Wed, 22 Oct 2025 12:15:07 -0300
Subject: [PATCH] mbusd: fix build with cmake4

---
 pkgs/by-name/mb/mbusd/package.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/by-name/mb/mbusd/package.nix b/pkgs/by-name/mb/mbusd/package.nix
index baba9df86a83..a80cf02fd297 100644
--- a/pkgs/by-name/mb/mbusd/package.nix
+++ b/pkgs/by-name/mb/mbusd/package.nix
@@ -22,6 +22,11 @@ stdenv.mkDerivation rec {
     pkg-config
   ];
 
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail "cmake_minimum_required(VERSION 3.2)" "cmake_minimum_required(VERSION 3.10)"
+  '';
+
   meta = {
     description = "Modbus TCP to Modbus RTU (RS-232/485) gateway";
     homepage = "https://github.com/3cky/mbusd";