anchor.diff:    };
   
     nativeBuildInputs = [
  -    autoreconfHook pkg-config
  +    autoreconfHook pkg-config makeWrapper
     ];
  +
     buildInputs = [
       libX11 libXcomposite libXft libXmu libXrandr libXext libXScrnSaver
       pam apacheHttpd pamtester
  
positive.code: { lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config
  , libX11, libXcomposite, libXft, libXmu, libXrandr, libXext, libXScrnSaver
  , pam, apacheHttpd, pamtester, xscreensaver }:
  
  stdenv.mkDerivation rec {
    pname = "xsecurelock";
  
negative.code:     EOF
    '';
  
    postInstall = ''
      wrapProgram $out/libexec/xsecurelock/saver_blank --prefix PATH : ${coreutils}/bin
    '';
  
    meta = with lib; {
      description = "X11 screen lock utility with security in mind";
      homepage = "https://github.com/google/xsecurelock";
  