anchor.diff:    passthru = {
       srcVerification = fetchurl {
         failEarly = true;
  -      pgpsigUrls = map (n: "${n}.asc") src.urls;
  -      pgpKeyFingerprint = "3AB0 57B7 E78D 945C 8C55  91FB D36F 769B C118 04F0";
  -      inherit (src) urls outputHash outputHashAlgo;
  +      inherit (src)
  +        urls
  +        outputHash
  +        outputHashAlgo;
  +      fullOpts = {
  +        pgpsigUrls = map (n: "${n}.asc") src.urls;
  +        pgpKeyFingerprint = "3AB0 57B7 E78D 945C 8C55  91FB D36F 769B C118 04F0";
  +      };
       };
     };
   
  
positive.code:   src = fetchurl {
      url = "mirror://sourceforge/e2fsprogs/e2fsprogs/v${version}/${name}.tar.gz";
      hashOutput = false;
      sha256 = "c2ae6d8ce6fb96b55886cf761411fc22ab41976f4f8297fc54c706df442483be";
    };
  
    buildInputs = [
  
negative.code: }:
  
  let
    version = "1.44.4";
  in
  stdenv.mkDerivation rec {
    name = "e2fsprogs-${version}";
  