From fb7a9db84174c249cc665a800a4b48f37e59fc11 Mon Sep 17 00:00:00 2001
From: Martin Joerg <martin.joerg@gmail.com>
Date: Mon, 6 Oct 2025 13:19:36 +0000
Subject: [PATCH] pingtcp: fix build against CMake >= 4.0

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

diff --git a/pkgs/by-name/pi/pingtcp/package.nix b/pkgs/by-name/pi/pingtcp/package.nix
index 7b5645bb821f..0fa922483fcc 100644
--- a/pkgs/by-name/pi/pingtcp/package.nix
+++ b/pkgs/by-name/pi/pingtcp/package.nix
@@ -19,6 +19,11 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
+  cmakeFlags = [
+    # fix compatibility with CMake (https://cmake.org/cmake/help/v4.0/command/cmake_minimum_required.html)
+    (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "4.0")
+  ];
+
   doCheck = false;
 
   postInstall = ''