Recommend CPANPLUS instead of hard-requiring it

perl-Module-Install.spec

@@ -1,6 +1,6 @@
 Name:           perl-Module-Install
 Version:        1.16
-Release:        7%{?dist}
+Release:        8%{?dist}
 Summary:        Standalone, extensible Perl module installer
 License:        GPL+ or Artistic
 Group:          Development/Libraries
@@ -61,7 +61,12 @@ Requires:       perl(:MODULE_COMPAT_%(eval "$(perl -V:version)"; echo $version))
 Requires:       perl(Archive::Zip) >= 1.37
 Requires:       perl(Carp)
 Requires:       perl(CPAN)
-Requires:       perl(CPANPLUS::Backend)
+# CPANPLUS is preferred over CPAN, but it's in a build cycle
+# (perl-Module-Install → perl-CPANPLUS → perl-DBIx-Simple → perl-SQL-Abstract
+# → perl-Module-Install), not necessary if all dependencies are retrived
+# from an RPM repository, and upstream still considered as an option. Thus do
+# not hard require the CPANPLUS.
+Recommends:     perl(CPANPLUS::Backend)
 Requires:       perl(Devel::PPPort) >= 3.16
 Requires:       perl(ExtUtils::MakeMaker) >= 6.59
 # Unused: Requires:       perl(ExtUtils::MM_Cygwin)
@@ -118,6 +123,9 @@ make test
 %{_mandir}/man3/*
 
 %changelog
+* Mon Feb 22 2016 Petr Pisar <ppisar@redhat.com> - 1.16-8
+- Recommend CPANPLUS instead of hard-requiring it
+
 * Thu Feb 04 2016 Fedora Release Engineering <releng@fedoraproject.org> - 1.16-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild