Q2) How do I know whether I have all the core modules? How do I not leave it to chance?
Why do you care?

I suspect it's because the first paragraph of the Carton docs is:

Carton only works with perl installation with the complete set of core modules. If you use perl installed by a vendor package with modules stripped from core, Carton is not expected to work correctly.

In reply to Re^2: Using Cartons to automate module installs by haukex
in thread Using Cartons to automate module installs by Aldebaran

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