cd vendor/extensions/employees
gem build refinerycms-employees.gemspec
gem install refinerycms-employees.gem
add the next line to the Gemfile
gem 'refinerycms-employees', git: "https://github.com/software-allies/refinerycms-employees.git"
and run the next lines in console
rails generate refinery:employees
rake db:migrate
rake db:seed
rails s