anchor.diff:    passthru = {
       srcVerification = fetchurl {
         failEarly = true;
  -      pgpDecompress = true;
  -      pgpsigUrls = map (n: "${n}.sign") tarballUrls;
  -      pgpKeyFingerprint = "96E0 7AF2 5771 9559 80DA  D100 20D0 4E5A 7136 60A7";
  -      inherit (src) urls outputHash outputHashAlgo;
  +      inherit (src)
  +        urls
  +        outputHash
  +        outputHashAlgo;
  +      fullOpts = {
  +        pgpDecompress = true;
  +        pgpsigUrls = map (n: "${n}.sign") tarballUrls;
  +        pgpKeyFingerprint = "96E0 7AF2 5771 9559 80DA  D100 20D0 4E5A 7136 60A7";
  +      };
       };
     };
   
  
positive.code:     gnused
    ];
  
    version = "2.18.0";
  
    tarballUrls = [
      "mirror://kernel/software/scm/git/git-${version}.tar"
  
negative.code:   src = fetchurl {
      urls = map (n: "${n}.xz") tarballUrls;
      hashOutput = false;
      sha256 = "180feff58fc0d965d23ea010aa2c69ead92ec318eb9b09cf737529aec62f3ef4";
    };
  
    nativeBuildInputs = [
  