anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "0.23.8";
  +      urls = tarballUrls "0.23.9";
         pgpsigUrls = map (n: "${n}.sig") urls;
         pgpKeyFingerprints = [
           "AED6 E2A1 85EE B379 F174  76D2 E012 D07A D0E3 CC30"
           "4622 25C3 B46F 3487 9FC8  496C D605 848E D7E6 9871"
         ];
         inherit (src) outputHashAlgo;
  -      outputHash = "4ba134e5fe4b62bcaf7a2d66841767d9d23e875b977bba6939367a9f400b133f";
  +      outputHash = "e1c1649c335107a8d33cf3762eb7f57b2d0681f0c7d8353627293a58d6b4db63";
       };
     };
   
  
positive.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "4ba134e5fe4b62bcaf7a2d66841767d9d23e875b977bba6939367a9f400b133f";
    };
  
    buildInputs = [
  
negative.code: }:
  
  let
    version = "0.23.9";
  
    tarballUrls = version: [
      "https://github.com/p11-glue/p11-kit/releases/download/${version}/p11-kit-${version}.tar.gz"
  