Hi! I'm maintaining the Arch Linux packages for all the puppet tooling. This also includes hiera, because that's listed as a dependency for puppet. It looks like the Travis/Appveyor configuration is broken since some time and I don't reall know on which ruby versions hiera works, I guess 2.7 since that's vendored in Puppet 7 AIO. Can you please take a look at https://github.com/puppetlabs/hiera/pull/430 / let me know the supported Ruby versions?