No POD found for META.json. Time to read the source?
META.json
To install RPi::ADC::MCP3008, copy and paste the appropriate command in to your terminal.
cpanm
cpanm RPi::ADC::MCP3008
CPAN shell
perl -MCPAN -e shell install RPi::ADC::MCP3008
For more information on module installation, please visit the detailed CPAN module installation guide.