https://metacpan.org/

local install perl package

cpanm -l ~/.local/perl5 Graph::Easy

It's possible to set a default install path, but the -l path option is fine if you're not installing a lot of these. Here's info on setting a default if you need it.

https://stackoverflow.com/questions/41527057/installing-perl-modules-to-a-specific-location

You'll also need to add the relevant paths to your PATH, MANPATH and create PERL_BASE and PERL5LIB variables.

export PERL_BASE="$HOME/.local/perl5"
export PERL5LIB="$PERL_BASE/lib/perl5"

export PATH="$HOME/.local/perl5/bin${PATH:+:$PATH}"
export MANPATH="$HOME/.local/perl5/man${MANPATH:+:$MANPATH}"