anchor.diff:      urls = [ "https://bitcoincore.org/bin/bitcoin-core-${version}/bitcoin-${version}.tar.gz"
                "https://bitcoin.org/bin/bitcoin-core-${version}/bitcoin-${version}.tar.gz"
              ];
  -    sha256 = "7ac9f972249a0a16ed01352ca2a199a5448fe87a4ea74923404a40b4086de284";
  +    sha256 = "f2591d555b8e8c2e1bd780e40d53a91e165d8b3c7e0391ae2d24a0c0f23a7cc0";
     };
   
     nativeBuildInputs =
  
positive.code: with stdenv.lib;
  
  let
    version = "0.19.0.1";
    majorMinorVersion = versions.majorMinor version;
  
    desktop = fetchurl {
  
negative.code:       parties. Users hold the crypto keys to their own money and transact directly
        with each other, with the help of a P2P network to check for double-spending.
      '';
      homepage = "https://bitcoin.org/";
      maintainers = with maintainers; [ roconnor AndersonTorres ];
      license = licenses.mit;
      platforms = platforms.unix;
  