anchor.diff:                   then []
                    else [ (stdenv.lib.overrideDerivation libuuid
                             (args: { configureFlags = args.configureFlags + " --enable-static"; })) ]);
  +
  +  arch = if stdenv.system == "x86_64-linux" then "x86_64"
  +    else if stdenv.system == "i686-linux" then "x86"
  +    else throw "vboot_reference for: ${stdenv.system} not supported!";
   
     buildPhase = ''
       make ARCH=${arch} `pwd`/build/cgpt/cgpt
  
positive.code:     cp build/utility/vbutil_keyblock $out/bin
      cp build/utility/vbutil_firmware $out/bin
    '';
  }
  
negative.code: { stdenv, fetchgit, pkgconfig, libuuid, openssl }:
  
  stdenv.mkDerivation rec {
    version = "20130507";
    checkout = "25/50225/2";
  
    name = "vboot_reference-${version}";
  
    src = fetchgit {
  