単純に Capfile と config/deploy.rb を複製すればよい．
% cp Capfile Capfile.host
% cp config/deploy.rb config/deploy_host.rb
% vim Capfile.host
# load 'config/deploy' -> load 'config/deploy_host'
% vim config/deploy_host.rb
# :app, :deploy_to, etc...
% cap -f Capfile.host deploy:setup
