anchor.diff:              buildPackages.libxslt
               buildPackages.docbook5
               buildPackages.docbook_xsl_ns
  +            buildPackages.autoconf-archive
               buildPackages.autoreconfHook
               buildPackages.pkgconfig
   
  
positive.code: 
              src = self;
  
              buildInputs =
                [ autoconf-archive
                  autoreconfHook
                  nix
                  curl
                  bzip2
                  xz
                  pkgconfig
                  pkgs.perl
                  boost
                ]
  
negative.code:           ];
  
          buildDeps =
            [ curl
              bzip2 xz brotli zlib editline
              openssl sqlite
              libarchive
              boost
              (if lib.versionAtLeast lib.version "20.03pre"
  