anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "0.23.15";
  +      urls = tarballUrls "0.23.16.1";
         fullOpts = {
           pgpsigUrls = map (n: "${n}.sig") urls;
           pgpKeyFingerprints = [
  
positive.code: }:
  
  let
    version = "0.23.15";
  
    tarballUrls = version: [
      "https://github.com/p11-glue/p11-kit/releases/download/${version}/p11-kit-${version}.tar.gz"
  
negative.code:         ];
        };
        inherit (src) outputHashAlgo;
        outputHash = "4b34e92ae36fa493e0d94366c767f06d5f9951e3d8581d10fd935d738db1574d";
      };
    };
  
  