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 = ''