rubyPackages.nokogiri: mark as broken for old libxml2

    ];

  } // lib.optionalAttrs stdenv.isDarwin {

    buildInputs = [ libxml2 ];

    # libxml 2.12 upgrade requires these fixes

    # https://github.com/sparklemotion/nokogiri/pull/3032

    # which don't trivially apply to older versions

    meta.broken = (lib.versionOlder attrs.version "1.16.0") && (lib.versionAtLeast libxml2.version "2.12");

  });

  openssl = attrs: {