anchor.diff:    src = fetchurl {
       urls = tarballUrls version;
       hashOutput = false;
  -    sha256 = "1cb9fa6d237539f25f62f4c3d4ec71a1c8e0772957ec45ec5af92134129e0d70";
  +    sha256 = "f7c139a0c77a1f0012619003e542060ba8f94799a0ef463026db390680e4d798";
     };
   
     buildInputs = [
  
positive.code:   passthru = {
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "0.23.14";
        fullOpts = {
          pgpsigUrls = map (n: "${n}.sig") urls;
          pgpKeyFingerprints = [
  
negative.code: }:
  
  let
    version = "0.23.15";
  
    tarballUrls = version: [
      "https://github.com/p11-glue/p11-kit/releases/download/${version}/p11-kit-${version}.tar.gz"
  