If you look into source of CPANPLUS::Internals::Fetch you will see that it sets $File::Fetch::PREFER_BIN depending on value of prefer_bin. Unfortunately after looking into File::Fetch source I see that this is TODO variable and is not actually used. Well, you just need to implement this functionality in File::Fetch ;)

In reply to Re^3: Force cpanpLUS to not use LWP by zwon
in thread Force cpanpLUS to not use LWP by Anonymous Monk

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