First, Clone this repository to your ~/src directory:
cd ~/src
git clone git://github.com/gugod/cpan-sets.git
Second, append the following line to your ~/.bashrc or ~/.zshrc:
source $HOME/src/cpan-sets/cpan-sets
Then, launch a new shell to see if it's working, try the command
cpan-sets, which prints the usage:
cpan-sets