diff --git a/lib/solidus_support.rb b/lib/solidus_support.rb
index c649f1d..5b4312f 100644
--- a/lib/solidus_support.rb
+++ b/lib/solidus_support.rb
@@ -68,15 +68,26 @@ def payment_method_parent_class(credit_card: false)
     end
 
     def frontend_available?
-      defined?(Spree::Frontend::Engine)
+      defined?(Spree::Frontend::Engine) ||
+        rails_config?(:frontend_available, true)
     end
 
     def backend_available?
-      defined?(Spree::Backend::Engine)
+      defined?(Spree::Backend::Engine) ||
+        rails_config?(:backend_available, true)
     end
 
     def api_available?
-      defined?(Spree::Api::Engine)
+      defined?(Spree::Api::Engine) ||
+        rails_config?(:api_available, true)
+    end
+
+    def rails_config?(name, value)
+      return false unless Rails.application
+
+      Rails.configuration.x.respond_to?(:solidus) &&
+        Rails.configuration.x.solidus.respond_to?(name) &&
+        (Rails.configuration.x.solidus.send(name) == value)
     end
   end
 end
diff --git a/lib/solidus_support/engine_extensions.rb b/lib/solidus_support/engine_extensions.rb
index c3375da..54065d2 100644
--- a/lib/solidus_support/engine_extensions.rb
+++ b/lib/solidus_support/engine_extensions.rb
@@ -15,9 +15,9 @@ def self.included(engine)
 
         config.to_prepare(&method(:activate))
 
-        enable_solidus_engine_support('backend') if SolidusSupport.backend_available?
-        enable_solidus_engine_support('frontend') if SolidusSupport.frontend_available?
-        enable_solidus_engine_support('api') if SolidusSupport.api_available?
+        enable_solidus_engine_support('backend')
+        enable_solidus_engine_support('frontend')
+        enable_solidus_engine_support('api')
       end
     end
 
@@ -82,17 +82,23 @@ def solidus_subscribers_root
       #
       # @see #load_solidus_decorators_from
       def enable_solidus_engine_support(engine)
-        paths['app/controllers'] << "lib/controllers/#{engine}"
-        paths['app/views'] << "lib/views/#{engine}"
+        initializer "#{name}_#{engine}_paths", before: :initialize_dependency_mechanism do
+          if SolidusSupport.send(:"#{engine}_available?")
+            paths['app/controllers'] << "lib/controllers/#{engine}"
+            paths['app/views'] << "lib/views/#{engine}"
+          end
+        end
 
-        path = root.join("lib/decorators/#{engine}")
+        if SolidusSupport.send(:"#{engine}_available?")
+          path = root.join("lib/decorators/#{engine}")
 
-        config.autoload_paths += path.glob('*')
+          config.autoload_paths += path.glob('*')
 
-        engine_context = self
-        config.to_prepare do
-          engine_context.instance_eval do
-            load_solidus_decorators_from(path)
+          engine_context = self
+          config.to_prepare do
+            engine_context.instance_eval do
+              load_solidus_decorators_from(path)
+            end
           end
         end
       end