anchor.diff:      owner = "spesmilo";
       repo = "electrum";
       rev = version;
  -    sha256 = "1r40i0v7nm35m3pzbd0l5z4qphl13s31l9v5njmyvpfjirdmhjbv";
  +    sha256 = "0bzvyfqnd0r0l8syf95hr3nsh8rmmmcs74bvc7v04v0nm5m0fmf1";
   
       extraPostFetch = ''
         mv $out ./all
  
positive.code: }:
  
  let
    version = "4.0.3";
  
    # electrum is not compatible with dnspython 2.0.0 yet
    # use the latest 1.x release instead
  
negative.code: 
    src = fetchurl {
      url = "https://download.electrum.org/${version}/Electrum-${version}.tar.gz";
      sha256 = "03dc5jwgp18sism5v4lbqfyn2zljchng8j2yi07yf8i01ivy2mmv";
    };
  
    postUnpack = ''
  