{ stdenv, stress-ng, coreutils }:

stdenv.mkDerivation {
  name = "cpu-intensive-task";
  src = ./.;

  buildInputs = [ stress-ng coreutils ];

  buildPhase = ''
    echo "Starting CPU intensive task..."

    # Utilize all CPU cores for 2 minutes
    stress-ng --cpu 0 --timeout 120s

    echo "Task completed!"
  '';

  installPhase = ''
    mkdir -p $out
    echo "Task completed!" > $out/result.txt
  '';
}