try this

jhongturney · jhongturney · commit d4f8998b8706 · 2024-01-29T12:21:45.000-08:00
diff --git a/Gemfile b/Gemfile
@@ -1,3 +1,5 @@
-source 'https://rubygems.org'
+source 'https://rubygems.org' do
+    gem 'puppet'
+end
 
 gemspec
