#2

lib/language_pack/rails5.rb

@@ -22,11 +22,13 @@ def initialize(build_path, cache_path=nil)
 
   def compile
     instrument "rails5.compile" do
-      @yarn_wrapper.install_node_modules_and_dependencies
       super
       allow_git do
         topic "rails5 compilie"
-        run_webpack_compile_rake_task
+        if @yarn_wrapper.node_app?
+          @yarn_wrapper.install_node_modules_and_dependencies
+          run_webpack_compile_rake_task
+        end
       end
     end
   end