Seems like bundler respects the .gem file name

Author: kateinoigakukun

packages/npm-packages/ruby-head-wasm-wasi/Gemfile

@@ -2,11 +2,11 @@
 
 source "https://rubygems.org"
 
-# We build ./vendor/cache/js-local.gem just before evaluating this Gemfile
+# We build ./vendor/cache/js-{version}.gem just before evaluating this Gemfile
 # so that Bundler builds extensions even from the local gem. (gem extensions
 # from "path:" gems are not built by Bundler.)
 # Thus even we specify version of "js" gem here, it should always installed
-# from the ./vendor/cache/js-local.gem, not from rubygems.org. To achieve this,
+# from the ./vendor/cache/js-{version}.gem, not from rubygems.org. To achieve this,
 # we always use non-exist version during development.
 require_relative "../../gems/js/lib/js/version.rb"
 gem "js", JS::VERSION

rakelib/packaging.rake

@@ -49,7 +49,7 @@ def vendor_gem_cache(pkg)
   mkdir_p vendor_cache_dir
   require_relative "../packages/gems/js/lib/js/version"
   sh "gem", "-C", "packages/gems/js", "build", "-o",
-    File.join(vendor_cache_dir, "js-local.gem")
+    File.join(vendor_cache_dir, "js-#{JS::VERSION}.gem")
 end
 
 namespace :npm do