anchor.diff:  
     src = fetchurl {
       urls = tarballUrls version;
  -    multihash = "QmaUHWFuu8kxP9wNNCdW1xrDD4zifu6qFSeb8cXbYWMUGE";
  +    multihash = "QmPyySgQcAjdbQtNFq6JLjmh1iUPwmp6gWoPvNhaUJdQ3c";
       hashOutput = false;
  -    sha256 = "b81864fa6a5ec776639c02ae89998955f7702a8d10e8b8f70023c5a599d97568";
  +    sha256 = "d76d79edc31cf76e782b9f697420d3defbcc91778c3c650658086a1b748e8792";
     };
   
     nativeBuildInputs = optionals (!libOnly) [
  
positive.code: }:
  
  let
    version = "1.8.24";
  
    tarballUrls = version: [
      "https://pcsclite.apdu.fr/files/pcsc-lite-${version}.tar.bz2"
  
negative.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "1.8.25";
        inherit (src)
          outputHashAlgo;
        outputHash = "d76d79edc31cf76e782b9f697420d3defbcc91778c3c650658086a1b748e8792";
        fullOpts = {
          pgpsigUrls = map (n: "${n}.asc") urls;
          pgpKeyFingerprint = "F5E1 1B9F FE91 1146 F41D  953D 78A1 B4DF E8F9 C57E";
  