anchor.diff:      # contains the string "perl", Configure would select $out/lib.
       # Miniperl needs -lm. perl needs -lrt.
       configureFlags =
  -      [ "-de"
  -        "-Dcc=cc"
  +      (if crossCompiling
  +       then [ "-Dlibpth=\"\"" "-Dglibpth=\"\"" ]
  +       else [ "-de" "-Dcc=cc" ])
  +      ++ [
           "-Uinstallusrbinperl"
           "-Dinstallstyle=lib/perl5"
           "-Duseshrplib"
  
positive.code:   libc = if stdenv.cc.libc or null != null then stdenv.cc.libc else "/usr";
    libcInc = lib.getDev libc;
    libcLib = lib.getLib libc;
    common = { version, sha256 }: stdenv.mkDerivation rec {
      name = "perl-${version}";
  
      src = fetchurlBoot {
  
negative.code:       maintainers = [ maintainers.eelco ];
        platforms = platforms.all;
      };
    } // stdenv.lib.optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform) rec {
      crossVersion = "1.1.8";
  
      perl-cross-src = fetchurlBoot {
        url = "https://github.com/arsv/perl-cross/releases/download/${crossVersion}/perl-cross-${crossVersion}.tar.gz";
        sha256 = "072j491rpz2qx2sngbg4flqh4lx5865zyql7b9lqm6s1kknjdrh8";
      };
  
      nativeBuildInputs = [ buildPackages.stdenv.cc ];
  
      postUnpack = ''
        unpackFile ${perl-cross-src}
        cp -R perl-cross-${crossVersion}/* perl-${version}/
      '';
  
      configurePlatforms = [ "build" "host" "target" ];
    });
  in rec {
    perl = perl524;
  
  