anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      urls = tarballUrls "2.0.4";
  +      urls = tarballUrls "2.0.5";
         pgpsigUrls = map (n: "${n}.sig") urls;
         pgpKeyFingerprint = "1CB2 7DBC 9861 4B2D 5841  646D 0830 2DB6 A267 0428";
         inherit (src) outputHashAlgo;
  -      outputHash = "a446ac5e40b801edfc4f6ba50fdeb614dcfeb34ab0d8c6868e29f359b877c201";
  +      outputHash = "0ff7a59eeedff3865fa17151d656991f56d8835f593982d7327af5e0bf9a9668";
       };
     };
   
  
positive.code: }:
  
  let
    version = "2.0.4";
  
    tarballUrls = version: [
      "mirror://gnu/libidn/libidn2-${version}.tar.lz"
  
negative.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "0ff7a59eeedff3865fa17151d656991f56d8835f593982d7327af5e0bf9a9668";
    };
  
    nativeBuildInputs = [
  