anchor.diff:        ++ optional stdenv.isSunOS "-Dcc=gcc"
         ++ optional enableThreading "-Dusethreads";
   
  -    configureScript = stdenv.lib.optionalString (!crossCompiling) "${stdenv.shell} ./Configure";
  +    configureScript = optionalString (!crossCompiling) "${stdenv.shell} ./Configure";
   
       dontAddPrefix = !crossCompiling;
   
  
positive.code:             }" /no-such-path \
            --replace "${stdenv.cc}" /no-such-path \
            --replace "$man" /no-such-path
        '' + stdenv.lib.optionalString crossCompiling
        ''
          mkdir -p $dev/lib/perl5/cross_perl/${version}
          for dir in cnf/{stub,cpan}; do
  
negative.code:       platforms = platforms.all;
        priority = 6; # in `buildEnv' (including the one inside `perl.withPackages') the library files will have priority over files in `perl`
      };
    } // optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform) rec {
      crossVersion = "980998f7d11baf97284426ca91f84681d49a08f5"; # Jul 20, 2019
  
      perl-cross-src = fetchurl {
  