dev(ext): ensure we use the rcd release candidate images

Author: flavorjones

rakelib/native.rake

@@ -69,7 +69,8 @@ namespace "gem" do
   cross_platforms.each do |platform|
     desc "build native gem for #{platform}"
     task platform do
-      RakeCompilerDock.sh(<<~EOF, platform: platform)
+      ENV["RCD_IMAGE"] = "ghcr.io/rake-compiler/rake-compiler-dock-snapshot:#{platform}"
+      RakeCompilerDock.sh(<<~EOF, platform: platform, verbose: true)
         gem install bundler --no-document &&
         bundle &&
         bundle exec rake gem:#{platform}:buildit