anchor.diff:    src = fetchgit {
       url    = "https://github.com/trezor/trezord";
       rev    = "refs/tags/v${version}";
  -    sha256 = "1606j5cfngryk4q21yiga1zvc3zpx4q8vqn6ljrvr679hpvlwni4";
  +    sha256 = "1iaxmwyidjdcrc6jg0859v6v5x3qnz5b0p78pq0bypvmgyijhpm4";
     };
   
     meta = with stdenv.lib; {
  
positive.code: { stdenv, fetchgit, curl, cmake, boost, gcc5, protobuf, pkgconfig, jsoncpp
  , libusb1, libmicrohttpd
  }:
  
  let
    version = "1.2.0";
  in
  
  stdenv.mkDerivation rec {
  
negative.code: 
    nativeBuildInputs = [
      cmake
      gcc
      pkgconfig
    ];
  
  