The configuration of the cpanm options in my installation. cpanm should not install "suggested" per default.

What configuration of the cpanm options, where did you see that?

App::cpanminus - It's dependency free (can bootstrap itself), requires zero configuration, and stands alone. When running, it requires only 10MB of RAM.

update: Please mark your updates , thank you. How do I change/delete my post?

So you're now saying installing Minilla installed Devel::PPPort and Dist::Zilla for you, as if you were using the experimental --with-suggests?

It doesn't for me

$ mversion Devel::PPPort Dist::Zilla
Warning: module 'Devel::PPPort' does not seem to be installed.
Warning: module 'Dist::Zilla' does not seem to be installed.

$ cpanm Minilla
--> Working on Minilla
Fetching http://www.cpan.org/authors/id/T/TO/TOKUHIROM/Minilla-v0.11.0
+.tar.gz ... OK
Configuring Minilla-v0.11.0 ... OK
Building and testing Minilla-v0.11.0 ... OK
Successfully installed Minilla-v0.11.0 (upgraded from v0.6.2)
1 distribution installed

$ mversion Devel::PPPort Dist::Zilla
Warning: module 'Devel::PPPort' does not seem to be installed.
Warning: module 'Dist::Zilla' does not seem to be installed.
[download]

Also perlbrew doesn't set PERL_CPANM_OPT