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.

Use the prompt() method from ExtUtils::MakeMaker/Module::Build.

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: Imager, Imager::Color, Imager::Color::Float, Imager::Color::Table, Imager::CountColor, Imager::Expr, Imager::Expr::Assem, Imager::ExtUtils, Imager::File::CUR, Imager::File::ICO, Imager::File::SGI, Imager::Fill, Imager::Filter::DynTest, Imager::Filter::Flines, Imager::Filter::Mandelbrot, Imager::Font, Imager::Font::BBox, Imager::Font::FreeType2, Imager::Font::Image, Imager::Font::Test, Imager::Font::Truetype, Imager::Font::Type1, Imager::Font::Wrap, Imager::Fountain, Imager::Matrix2d, Imager::Preprocess, Imager::Probe, Imager::Regops, Imager::Test, Imager::Transform

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

Error: 0.02,0.03,0.96_01,1.000,1.0001,1.002,1.003,1.005,1.006,1.007,1.011,1.012,1.020,1.037

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.

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