master
appraise 'spree-3-7' do gem 'spree', '~> 3.7.0' gem 'sass-rails' end appraise 'spree-4-0' do gem 'spree', '~> 4.0.0' end appraise 'spree-master' do gem 'spree', github: 'spree/spree', branch: 'master' end