anchor.diff:      optionalString;
   in
   stdenv.mkDerivation rec {
  -  name = "wget-1.19.5";
  +  name = "wget-1.20.1";
   
     src = fetchurl {
       url = "mirror://gnu/wget/${name}.tar.lz";
       hashOutput = false;
  -    sha256 = "29fbe6f3d5408430c572a63fe32bd43d5860f32691173dfd84edc06869edca75";
  +    sha256 = "0f63e84dd23dc53ab3ab6f483c3afff8301e54c165783f772101cdd9b1c64928";
     };
   
     nativeBuildInputs = [
       gettext
  +    lzip
     ];
   
     buildInputs = [
  
positive.code: , libunistring
  , lzip
  , openssl
  , pcre
  , util-linux_lib
  , zlib
  
  , perl
  , perlPackages
  , python3
  }:
  
  let
  
negative.code:     libmetalink
      libpsl
      libunistring
      openssl
      pcre2_lib
      util-linux_lib
      zlib
    ];
  
    configureFlags = [
      "--with-ssl=openssl"
      "--with-metalink"
      "--with-cares"
      "--with-openssl"
    ];
  
    passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        inherit (src)
          urls
          outputHash
          outputHashAlgo;
        fullOpts = {
          pgpsigUrls = map (n: "${n}.sig") src.urls;
          pgpKeyFingerprint = "1CB2 7DBC 9861 4B2D 5841  646D 0830 2DB6 A267 0428";
        };
      };
    };
  
  