anchor.diff:      owner = "spesmilo";
       repo = "electrum";
       rev = version;
  -    sha256 = "wYblwD+ej65TVkYS7u5MiB37Ka8jENI3aoHi64xAFtU=";
  +    sha256 = "sha256-z2/UamKmBq/5a0PTbHdAqGK617Lc8xRhHRpbCc7jeZo=";
   
       postFetch = ''
         mv $out ./all
  
positive.code: }:
  
  let
    version = "4.3.1";
  
    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-vTZArTwbKcf6/vPQOvjubPecsg+h+QlZ6rdbl6qNfs0=";
    };
  
    postUnpack = ''
  