If I want to install a CPAN module in a location that doesn't interfere with my package manager, I typically use 
    perl Makefile.PL INSTALLBASE=/home/me/perl-lib

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and then use 

    PERL5LIB=/home/me/perl-lib/lib/perl5 perl-script

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to run scripts using that new hierarchy of perl libs.

However, instead of using an ENV variable, I'd like to use code like 

    use lib '/home/me/perl-lib/lib/perl5';

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which, unfortunately, and contrary to the explanation in perlrun, isn't the same. For example, if you have architecture-dependent code that ends up in something like /home/me/perl-lib/lib/perl5/i686-linux-thread-multi, then PERL5LIB set to /home/me/perl-lib/lib/perl5 will find it, while 'use lib' won't.

Questions:

  1. What are you doing to keep Perl modules installed by your package manager and CPAN modules separate?
  2. Is INSTALLBASE still the recommended way of installing modules in a different than the standard location with MakeMaker?
  3. Is there a directive in Perl that does what PERL5LIB does (without using PERL5LIB)?
Thanks for any insight.

In reply to PERL5LIB different than 'use lib' by saintmike

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