diff --git a/lib/warbler/task.rb b/lib/warbler/task.rb
index 91dcdce..27100f7 100644
--- a/lib/warbler/task.rb
+++ b/lib/warbler/task.rb
@@ -240,6 +240,8 @@ module Warbler
       spec = matched.last

       gem_name = "#{spec.name}-#{spec.version}"
+      platform = spec.original_platform || spec.platform
+      gem_name << "-#{platform}" unless platform.nil? || platform == Gem::Platform::RUBY
       gem_unpack_task_name = "gem:#{gem_name}"
       return if Rake::Task.task_defined?(gem_unpack_task_name)