I think part of it is the use of --self-contained, while also not having the core modules available maybe due to overriding PERL5LIB and Perl itself not supplying the correct path, maybe due to running a Win32 Perl while expecting a Cygwin Perl.

In reply to Re^2: Installation of 2 module prerequisites failing - using cpanm by Corion
in thread Installation of 2 module prerequisites failing - using cpanm by Intrepid

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