anchor.diff:    passthru = {
       srcVerification = fetchurl rec {
         failEarly = true;
  -      sha256Urls = map (n: "${n}.SHA256SUM.asc") src.urls;
  -      pgpKeyFingerprint = "7100 AADF AE6E 6E94 0D2E  0AD6 55E4 5A5A E8CA 7C8A";
  -      inherit (src) urls outputHash outputHashAlgo;
  +      inherit (src)
  +        urls
  +        outputHash
  +        outputHashAlgo;
  +      fullOpts = {
  +        sha256Urls = map (n: "${n}.SHA256SUM.asc") src.urls;
  +        pgpKeyFingerprint = "7100 AADF AE6E 6E94 0D2E  0AD6 55E4 5A5A E8CA 7C8A";
  +      };
       };
     };
   
  
positive.code:   src = fetchurl {
      url = "https://github.com/seccomp/libseccomp/releases/download/v${version}/${name}.tar.gz";
      hashOutput = false;
      sha256 = "7fc28f4294cc72e61c529bedf97e705c3acf9c479a8f1a3028d4cd2ca9f3b155";
    };
  
    buildInputs = [
  
negative.code: }:
  
  let
    version = "2.4.0";
  in
  stdenv.mkDerivation rec {
    name = "libseccomp-${version}";
  