anchor.diff:  
     src = fetchurl {
       url = "https://download.electrum.org/${version}/Electrum-${version}.tar.gz";
  -    sha256 = "1mlwpmgfm3n45agx65jzsi4dr8nxf95x7nl01jnwa3qk5krrv4cf";
  +    sha256 = "188r4zji985z8pm9b942xhmvv174yndk6jxagxl7ljk03wl2wiwi";
     };
   
     postUnpack = ''
  
positive.code: }:
  
  let
    version = "4.1.3";
  
    libsecp256k1_name =
      if stdenv.isLinux then "libsecp256k1.so.0"
  
negative.code:     owner = "spesmilo";
      repo = "electrum";
      rev = version;
      sha256 = "1ps8yaps5kfd7yv7bpdvssbwm6f5qivxcvhwn17cpddc2760a7nk";
  
      extraPostFetch = ''
        mv $out ./all
  