anchor.diff:  , stdenv
   , fetchurl
   , fetchFromGitHub
  -, fetchpatch
   , wrapQtAppsHook
   , python3
   , zbar
  
positive.code: 
    src = fetchurl {
      url = "https://download.electrum.org/${version}/Electrum-${version}.tar.gz";
      sha256 = "sha256-E941wseIQEn1+d06NWKQLQM0C+A8a0+Xxl+LzBTwEcw=";
    };
  
    postUnpack = ''
  
negative.code: }:
  
  let
    version = "4.3.1";
  
    libsecp256k1_name =
      if stdenv.isLinux then "libsecp256k1.so.0"
  