anchor.diff:  { lib, stdenv, gcc-arm-embedded, binutils-arm-embedded, makeWrapper
  -, python2Packages
  +, python3Packages
   
   # Extra options
   , device ? "fsij", vid ? "234b", pid ? "0000"
  
positive.code:   '';
  
    meta = with lib; {
      homepage = "http://www.fsij.org/pages/gnuk";
      description = "An implementation of USB cryptographic token for gpg";
      license = licenses.gpl3;
      platforms = with platforms; linux;
  
negative.code:   inherit src;
  
    nativeBuildInputs = [ gcc-arm-embedded binutils-arm-embedded makeWrapper ];
    buildInputs = with python3Packages; [ python pyusb colorama ];
  
    configurePhase = ''
      cd src
  