Is there a way to blacklist modules for cpan* client(s) which may be installed indirectly (dependency; in case of cpan, "recommends_policy"). Yes, I can turn off "recommends_policy" but that is all-or-nothing decision.

(Well, I installed MCE::Hobo. IO::FDPass was installed for being listed in recommended module. That apparently may not work with perl 5.22+ (5.26 installed here) ... 

** Canary::Stability COMPATIBILITY AND SUPPORT CHECK
...
*** However, in recent releases, P5P (who maintain perl) have been
*** introducing regressions that are sometimes subtle and at other times
*** catastrophic, often for personal preferences with little or no concern
*** for existing code, most notably CPAN.
***
*** For this reason, it has become very hard for me to maintain the level
*** of reliability and support I have committed myself to in the past, at
*** least with some perl versions: I simply can't keep up working around new
*** bugs or gratituous incompatibilities, and in turn you might suffer from
*** unanticipated problems.
***
*** Therefore I have introduced a support and compatibility check, the results
*** of which follow below, together with a FAQ and some recommendations.
***
*** This check is just to let you know that there might be a risk, so you can
*** make judgement calls on how to proceed - it will not keep the module from
*** installing or working.
***
*** The stability canary says: (nothing, it was driven away by harsh weather)
***
*** It seems you are running perl version 5.026000, likely the "official" or
*** "standard" version. While there is nothing wrong with doing that,
*** standard perl versions 5.022 and up are not supported by IO::FDPass.
*** While this might be fatal, it might also be all right - if you run into
*** problems, you might want to downgrade your perl or switch to the
*** stability branch.
...

... I am not about to set environment variables for each such module.)

In reply to module blacklist for cpan* by Anonymous Monk

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