rubygems.rb in bundler-2.5.16

- old
+ new

@@ -204,9 +204,10 @@
 
         installed_spec = installer.install
 
         spec.full_gem_path = installed_spec.full_gem_path
         spec.loaded_from = installed_spec.loaded_from
+        spec.base_dir = installed_spec.base_dir
 
         spec.post_install_message
       end
 
       def cache(spec, custom_path = nil)