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 '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: Extensions::ImageBack::ImageBack, PreLoad, Tie::Watch, Tk, Tk::Adjuster, Tk::After, Tk::Animation, Tk::Balloon, Tk::Bitmap, Tk::BrowseEntry, Tk::Button, Tk::Canvas, Tk::Checkbutton, Tk::Clipboard, Tk::CmdLine, Tk::ColorDialog, Tk::ColorEditor, Tk::ColorSelect, Tk::Compound, Tk::Configure, Tk::Derived, Tk::Dialog, Tk::DialogBox, Tk::DirTree, Tk::Dirlist, Tk::DragDrop, Tk::DragDrop::Common, Tk::DragDrop::Local, Tk::DragDrop::Rect, Tk::DragDrop::SunConst, Tk::DragDrop::SunDrop, Tk::DragDrop::SunSite, Tk::DragDrop::Win32Drop, Tk::DragDrop::Win32Site, Tk::DragDrop::XDNDDrop, Tk::DragDrop::XDNDSite, Tk::DropSite, Tk::DummyEncode, Tk::English, Tk::Entry, Tk::ErrorDialog, Tk::Event, Tk::Event::IO, Tk::FBox, Tk::FileSelect, Tk::FloatEntry, Tk::Font, Tk::Frame, Tk::HList, Tk::IO, Tk::IconList, Tk::Image, Tk::InputO, Tk::ItemStyle, Tk::JPEG, Tk::LabEntry, Tk::LabFrame, Tk::LabRadiobutton, Tk::Label, Tk::Labelframe, Tk::Listbox, Tk::MMtry, Tk::MMutil, Tk::MainWindow, Tk::MakeDepend, Tk::Menu, Tk::Menu::Item, Tk::Menubar, Tk::Menubutton, Tk::Message, Tk::MsgBox, Tk::Mwm, Tk::NBFrame, Tk::NoteBook, Tk::Optionmenu, Tk::PNG, Tk::Pane, Tk::Panedwindow, Tk::Photo, Tk::Pixmap, Tk::Pretty, Tk::ProgressBar, Tk::ROText, Tk::Radiobutton, Tk::Region, Tk::Reindex, Tk::ReindexedROText, Tk::ReindexedText, Tk::Scale, Tk::Scrollbar, Tk::Spinbox, Tk::Stats, Tk::Submethods, Tk::TList, Tk::Table, Tk::Text, Tk::Text::Tag, Tk::TextEdit, Tk::TextList, Tk::TextUndo, Tk::Tiler, Tk::TixGrid, Tk::Toplevel, Tk::Trace, Tk::Tree, Tk::Widget, Tk::WinPhoto, Tk::Wm, Tk::X, Tk::X11Font, Tk::Xlib, Tk::Xrm, Tk::install, Tk::widgets

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

Error: 1.302,4.002,4.003,4.004,4.005,4.006,4.007,4.008,4.009,4.010,4.011,4.012,4.013,4.014,4.015,4.016,4.018,4.021,4.022,4.023,4.026,4.031,4.037,4.72,804.034_501

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.