title: change install location of files in rpm generated with cpan2rpm
body: <p>I am trying to generate RPMs with <code>cpan2rpm</code> command.</p>
  <p>The generated rpm places files in <code>/usr/local/share/perl5</code> instead of <code>/usr/share/perl5</code>.</p>
  <p>cpan2rpm <a href="https://metacpan.org/release/BBB/cpan2rpm-2.028_04/view/cpan2rpm" rel="nofollow noreferrer">help</a> doesn't seem to mention any option to do this.</p>
  <p>Is it possible to change the location to <code>/usr/share/perl5</code></p>
  <p>command used</p>
  <pre><code>cpan2rpm --version 0.27 --release 1000000000.el8 --debug=1 --packager=XXXXXXX --distribution=unknown --author XXXXXXX (unknown) --no-sign Catalyst-Plugin-Session-0.40.tar.gz
  </code></pre>
  <p>perl version 5.26</p>
  <p>as suggested in comments, I had configured the environment variable</p>
  <pre><code>export PERL_INSTALL_ROOT=/usr/share/perl5
  </code></pre>
  <p>but still the files are being generated to <code>/usr/local/share/perl5</code></p>
  <pre><code>$ rpm -qlp /output/perl-Catalyst-Plugin-Session-0.40-1000000000.el8.noarch.rpm
  /usr/local/share/man
  /usr/local/share/man/man3
  /usr/local/share/man/man3/Catalyst::Plugin::Session.3pm
  /usr/local/share/man/man3/Catalyst::Plugin::Session::State.3pm
  /usr/local/share/man/man3/Catalyst::Plugin::Session::Store.3pm
  /usr/local/share/man/man3/Catalyst::Plugin::Session::Store::Dummy.3pm
  /usr/local/share/man/man3/Catalyst::Plugin::Session::Test::Store.3pm
  /usr/local/share/man/man3/Catalyst::Plugin::Session::Tutorial.3pm
  /usr/local/share/perl5/Catalyst
  /usr/local/share/perl5/Catalyst/Plugin
  /usr/local/share/perl5/Catalyst/Plugin/Session
  /usr/local/share/perl5/Catalyst/Plugin/Session.pm
  /usr/local/share/perl5/Catalyst/Plugin/Session/State.pm
  /usr/local/share/perl5/Catalyst/Plugin/Session/Store
  /usr/local/share/perl5/Catalyst/Plugin/Session/Store.pm
  /usr/local/share/perl5/Catalyst/Plugin/Session/Store/Dummy.pm
  /usr/local/share/perl5/Catalyst/Plugin/Session/Test
  /usr/local/share/perl5/Catalyst/Plugin/Session/Test/Store.pm
  /usr/local/share/perl5/Catalyst/Plugin/Session/Tutorial.pod
  /usr/share/doc/perl-Catalyst-Plugin-Session
  /usr/share/doc/perl-Catalyst-Plugin-Session/Changes
  /usr/share/doc/perl-Catalyst-Plugin-Session/README
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/AuthorTests.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/Base.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/Can.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/Fetch.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/Makefile.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/Metadata.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/Win32.pm
  /usr/share/doc/perl-Catalyst-Plugin-Session/inc/Module/Install/WriteAll.pm
  </code></pre>