Gemfile in blacklight-5.6.0 vs Gemfile in blacklight-5.7.0

@@ -1,11 +1,10 @@
 source 'https://rubygems.org'
 
 # Please see blacklight.gemspec for dependency information.
 gemspec path: File.expand_path('..', __FILE__)
 
-
 # Peg simplecov to < 0.8 until this is resolved:
 # https://github.com/colszowka/simplecov/issues/281
 gem 'simplecov', '~> 0.7.1', require: false
 gem 'coveralls', require: false
 
@@ -18,6 +17,11 @@
 
 file = File.expand_path("Gemfile", ENV['ENGINE_CART_DESTINATION'] || ENV['RAILS_ROOT'] || File.expand_path("../spec/internal", __FILE__))
 if File.exists?(file)
   puts "Loading #{file} ..." if $DEBUG # `ruby -d` or `bundle -v`
   instance_eval File.read(file)
+else
+  gem 'rails', ENV['RAILS_VERSION'] if ENV['RAILS_VERSION']
+
+  # explicitly include sass-rails to get compatible sprocket dependencies
+  gem 'sass-rails'
 end