case $(uname -s) in
Linux)
  install_package "truffleruby-21.0.0" "https://github.com/oracle/truffleruby/releases/download/vm-21.0.0/truffleruby-21.0.0-linux-amd64.tar.gz#33fb48276c682371939e1146f08e762703ec3d970408614c5380f2b9af37c0df" truffleruby
  ;;
Darwin)
  use_homebrew_openssl
  install_package "truffleruby-21.0.0" "https://github.com/oracle/truffleruby/releases/download/vm-21.0.0/truffleruby-21.0.0-macos-amd64.tar.gz#4886d75f4dd2888f9330a690a7acf755eaf04dbc0c73463952155eb1d3046ee9" truffleruby
  ;;
*)
  colorize 1 "Unsupported operating system: $(uname -s)"
  return 1
  ;;
esac