anchor.diff:  { stdenv, fetchurl, fetchFromGitHub, python3, python3Packages, zbar, secp256k1
  +, enableQt ? !stdenv.isDarwin
   
   
   # for updater.nix
  
positive.code: 
  let
    version = "3.3.8";
  
    # Not provided in official source releases, which are what upstream signs.
    tests = fetchFromGitHub {
  
negative.code:     '';
      homepage = https://electrum.org/;
      license = licenses.mit;
      platforms = platforms.all;
      maintainers = with maintainers; [ ehmry joachifm np ];
    };
  }
  