Use the old syntax.

gitlab/recipes/gitlab.rb

@@ -94,7 +94,7 @@ ruby_block "Copy from example rack attack config" do
     resource.mode 0644
     resource.run_action :create
     if resource.updated?
-      self.notifies :run, resources(bash: "Enable rack attack in application.rb"), :immediately
+      self.notifies :run, resources(:bash => "Enable rack attack in application.rb"), :immediately
     end
   end
 end
@@ -221,7 +221,7 @@ when 'production'
       resource.mode 0755
       resource.run_action :create
       if resource.updated?
-        self.notifies :run, resources(execute: "set gitlab to start on boot"), :immediately
+        self.notifies :run, resources(:execute => "set gitlab to start on boot"), :immediately
       end
     end
   end