If you are using Build.PL define the {requires}{perl} = VERSION field. If you are using MakeMaker (Makefile.PL) you should upgrade ExtUtils::MakeMaker to 6.48 and use MIN_PERL_VERSION parameter. Perl::MinimumVersion can help you determine which version of Perl your module needs.

Add a META.json to the distribution. Your buildtool should be able to autogenerate it.

Add 'use warnings' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.

Error: CGI::Kwiki, CGI::Kwiki::Backup, CGI::Kwiki::Backup::Rcs, CGI::Kwiki::Backup::SVN, CGI::Kwiki::Backup::SVNPerl, CGI::Kwiki::Blog, CGI::Kwiki::CGI, CGI::Kwiki::Changes, CGI::Kwiki::Config, CGI::Kwiki::Config_yaml, CGI::Kwiki::Cookie, CGI::Kwiki::Database, CGI::Kwiki::Display, CGI::Kwiki::Driver, CGI::Kwiki::Edit, CGI::Kwiki::Formatter, CGI::Kwiki::I18N, CGI::Kwiki::I18N::i_default, CGI::Kwiki::Import, CGI::Kwiki::Javascript, CGI::Kwiki::Metadata, CGI::Kwiki::New, CGI::Kwiki::Pages, CGI::Kwiki::Pages::zh_cn, CGI::Kwiki::Pages::zh_tw, CGI::Kwiki::Plugin, CGI::Kwiki::Plugin::Diff, CGI::Kwiki::Prefs, CGI::Kwiki::Privacy, CGI::Kwiki::Scripts, CGI::Kwiki::Search, CGI::Kwiki::Slides, CGI::Kwiki::Style, CGI::Kwiki::Template

Split the distribution, or fix the version numbers to make them consistent (use the highest version number to avoid version downgrade).

Error: 0.01,0.14,0.15,0.16,0.18

Add all modules contained in this distribution to the META.yml field 'provides'. Module::Build or Dist::Zilla::Plugin::MetaProvides do this automatically for you.

Add a 'repository' resource to the META.yml via 'meta_add' accessor (for Module::Build) or META_ADD parameter (for ExtUtils::MakeMaker).

This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.