anchor.diff:  }:
   stdenv.mkDerivation rec {
     name = "libcpuid-${version}";
  -  version = "0.2.2";
  +  version = "0.4.0";
   
  -  src = fetchgit {
  -    url = https://github.com/anrieff/libcpuid.git;
  -    rev = "535ec64dd9d8df4c5a8d34b985280b58a5396fcf";
  -    sha256 = "1j9pg7fyvqhr859k5yh8ccl9jjx65c7rrsddji83qmqyg0vp1k1a";
  +  src = fetchFromGitHub {
  +    owner = "anrieff";
  +    repo = "libcpuid";
  +    rev = "v${version}";
  +    sha256 = "136kv6m666f7s18mim0vdbzqvs4s0wvixa12brj9p3kmfbx48bw7";
     };
   
     patchPhase = ''
       libtoolize
       autoreconf --install
  - '';
  +  '';
   
     configurePhase = ''
       mkdir -p Install
  
positive.code: 
      mkdir -p $out
      sed -i -re "s#(prefix=).*Install#\1$out#g" Install/lib/pkgconfig/libcpuid.pc
   
      cp -r Install/* $out
      cp -r tests $out
    '';
  
    buildInputs = [
      libtool
      automake
      autoconf
  
negative.code: { stdenv
  , fetchFromGitHub
  , libtool
  , automake
  , autoconf
  