From 00cf86e955ecae938a92605f2ee142245fc22047 Mon Sep 17 00:00:00 2001
From: Chris McDonough <chrism@plope.com>
Date: Wed, 15 Oct 2025 04:33:06 -0400
Subject: [PATCH] pigpio: fix cmake 4 build failure

https://github.com/NixOS/nixpkgs/issues/445447
---
 pkgs/by-name/pi/pigpio/package.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/by-name/pi/pigpio/package.nix b/pkgs/by-name/pi/pigpio/package.nix
index 796847528482..a106642e4931 100644
--- a/pkgs/by-name/pi/pigpio/package.nix
+++ b/pkgs/by-name/pi/pigpio/package.nix
@@ -14,6 +14,11 @@ mkDerivation rec {
   version = "79";
   format = if buildPythonPackage == null then null else "setuptools";
 
+  cmakeFlags = [
+    # https://github.com/NixOS/nixpkgs/issues/445447
+    (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.10")
+  ];
+
   src = fetchFromGitHub {
     owner = "joan2937";
     repo = "pigpio";