anchor.diff:      owner = "spesmilo";
       repo = "electrum";
       rev = version;
  -    sha256 = "1ps8yaps5kfd7yv7bpdvssbwm6f5qivxcvhwn17cpddc2760a7nk";
  +    sha256 = "sha256-BoikYSsQZAv8WswIr5nmBsGmjZbTXaLAbdO2QtPvc7c=";
   
       extraPostFetch = ''
         mv $out ./all
         mv ./all/electrum/tests $out
       '';
  -  };
  -
  -  py = python3.override {
  -    packageOverrides = self: super: {
  -
  -      aiorpcx = super.aiorpcx.overridePythonAttrs (oldAttrs: rec {
  -        version = "0.18.7";
  -        src = oldAttrs.src.override {
  -          inherit version;
  -          sha256 = "1rswrspv27x33xa5bnhrkjqzhv0sknv5kd7pl1vidw9d2z4rx2l0";
  -        };
  -      });
  -    };
     };
   
   in
  
positive.code: }:
  
  let
    version = "4.1.5";
  
    libsecp256k1_name =
      if stdenv.isLinux then "libsecp256k1.so.0"
  
negative.code: 
    src = fetchurl {
      url = "https://download.electrum.org/${version}/Electrum-${version}.tar.gz";
      sha256 = "sha256-2SxSTH9P380j2KaCbkXjgmQO7K2z81AG6PMA/EMggXA=";
    };
  
    postUnpack = ''
  