- adduser
 - cron | cron-daemon
 - dirmngr
 - default-mta | postfix | mail-transport-agent
 - lsb-base
 - rake (>= 10.5.0~)
 - ruby | ruby-interpreter
 - ruby-activerecord (>= 5.2~)
 - ruby-charlock-holmes
 - ruby-gpgme (>= 2.0.13~)
 - ruby-mail (>= 2.7.1~)
 - ruby-mail-gpg (>= 0.3.3~)
 - ruby-sinatra (>= 2~)
 - ruby-sinatra-contrib (>= 2~)
 - ruby-sqlite3
 - ruby-thor
 - thin