anchor.diff:  , withPython3 ? true, python3, ncurses
   , withPHP80 ? false, php80
   , withPHP81 ? true, php81
  -, withPerl532 ? false, perl532
  -, withPerl534 ? true, perl534
  +, withPerl534 ? false, perl534
  +, withPerl536 ? true, perl536
   , withPerldevel ? false, perldevel
   , withRuby_2_7 ? true, ruby_2_7
   , withRuby_3_0 ? false, ruby_3_0
  
positive.code:     ++ optionals withPython3 [ python3 ncurses ]
      ++ optional withPHP80 php80-unit
      ++ optional withPHP81 php81-unit
      ++ optional withPerl532 perl532
      ++ optional withPerl534 perl534
      ++ optional withPerldevel perldevel
      ++ optional withRuby_2_7 ruby_2_7
      ++ optional withRuby_3_0 ruby_3_0
  
negative.code:     ${optionalString withPython3    "./configure python --module=python3  --config=python3-config  --lib-path=${python3}/lib"}
      ${optionalString withPHP80      "./configure php    --module=php80    --config=${php80-unit.unwrapped.dev}/bin/php-config --lib-path=${php80-unit}/lib"}
      ${optionalString withPHP81      "./configure php    --module=php81    --config=${php81-unit.unwrapped.dev}/bin/php-config --lib-path=${php81-unit}/lib"}
      ${optionalString withPerl534    "./configure perl   --module=perl534  --perl=${perl534}/bin/perl"}
      ${optionalString withPerl536    "./configure perl   --module=perl536  --perl=${perl536}/bin/perl"}
      ${optionalString withPerldevel  "./configure perl   --module=perldev  --perl=${perldevel}/bin/perl"}
      ${optionalString withRuby_2_7   "./configure ruby   --module=ruby27   --ruby=${ruby_2_7}/bin/ruby"}
      ${optionalString withRuby_3_0   "./configure ruby   --module=ruby30   --ruby=${ruby_3_0}/bin/ruby"}
  