If you want install from your local CPAN::Mini mirror:
$ cpanm --from $HOME/minicpan Distribution::To::Install
If you want install from your local CPAN::Mini mirror and if this fail, installation continues as always:
$ cpanm --mirror $HOME/minicpan
You can specify your above choice more permanently using an environment variable:
export PERL_CPANM_OPT="--mirror $HOME/.minicpan --mirror-only"