But any idea on why it might install fine on an older OS and not on Catalina?

Nope, sorry. There is a possibility that something changed between those OS versions, but the specs document is pretty clear that the behavior causing the test failure is allowed, so unless I've missed something I still think the test is the problem here.

In reply to Re^3: Fixing CPAN module with c extension by haukex
in thread Fixing CPAN module with c extension by nysus

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