anchor.diff:      "mirror://cpan/src/5.0/perl-${version}.tar.xz"
     ];
   
  -  version = "5.26.0";
  +  version = "5.26.1";
   in
   stdenv.mkDerivation rec {
     name = "perl-${version}";
  
positive.code:   src = fetchurl {
      urls = tarballUrls version;
      hashOutput = false;
      sha256 = "9bf2e3d0d72aad77865c3bdbc20d3b576d769c5c255c4ceb30fdb9335266bf55";
    };
  
    setupHook = ./setup-hook.sh;
  
negative.code:     libPrefix = "lib/perl5/site_perl";
      srcVerification = fetchurl rec {
        failEarly = true;
        urls = tarballUrls "5.26.1";
        outputHash = "fe8208133e73e47afc3251c08d2c21c5a60160165a8ab8b669c43a420e4ec680";
        inherit (src) outputHashAlgo;
        sha256Urls = map (n: "${n}.sha256.txt") urls;
        sha1Urls = map (n: "${n}.sha1.txt") urls;
  