Package: libcgi-session-serialize-yaml-perl Version: 4.26-2 The Debian package requires that libyaml-perl or libyaml-syck-perl be installed, but it is possible to use this package without either of those YAML modules. You can specify your own YAML parser (like YAML::XS).
There is some discussion about this on CPAN: https://rt.cpan.org/Ticket/Display.html?id=136485 https://rt.cpan.org/Ticket/Display.html?id=136486 Tina Muller, an engineer at SUSE and the maintainer of CGI::Session::Serialize::yaml, YAML, and YAML::XS, has also pointed out that openSUSE doesn't require these dependencies: https://build.opensuse.org/package/view_file/devel:languages:perl/perl-CGI-S ession-Serialize-yaml/perl-CGI-Session-Serialize-yaml.spec?expand=1.