You set the install path with --install_base resp. INSTALL_BASE. The CPAN configuration variables mbuildpl_arg resp. makepl_arg and the environment variables PERL_MB_OPT and PERL_MM_OPT can supply default values. If these are not set, modules are installed automatically into the appropriate place.

I have no idea how it could happen that you end up with both /lib and /lib64. Some information is lacking from you. Show the output of

In reply to Re: Setting build path for modules by daxim
in thread Setting build path for modules by Skyeheart

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