anchor.diff:    '';
   
     meta = with lib; {
  -    description = "dynamic Tracing in Linux";
  +    description = "Dynamic tracing in Linux";
       homepage = "https://wkz.github.io/ply/";
       license = [ licenses.gpl2 ];
       maintainers = with maintainers; [ mic92 mbbx6spp ];
  
positive.code: assert kernel != null -> lib.versionAtLeast kernel.version "4.0";
  
  let
    version = "1.0.beta1-9e810b1";
  in stdenv.mkDerivation {
    pname = "ply";
    inherit version;
  
negative.code:   src = fetchFromGitHub {
      owner = "iovisor";
      repo = "ply";
      rev = "899afb0c35ba2191dd7aa21f13bc7fde2655c475";
      sha256 = "0mfnfczk6kw6p15nx5l735qmcnb0pkix7ngq0j8nndg7r2fsckah";
    };
  
    preAutoreconf = ''
  