case $(uname -s) in
Linux)
  install_package "truffleruby-20.2.0" "https://github.com/oracle/truffleruby/releases/download/vm-20.2.0/truffleruby-20.2.0-linux-amd64.tar.gz#324e22f510b217c3649d125abda1690b15df474a026efa76e6d5d3e35a771248" truffleruby
  ;;
Darwin)
  install_package "truffleruby-20.2.0" "https://github.com/oracle/truffleruby/releases/download/vm-20.2.0/truffleruby-20.2.0-macos-amd64.tar.gz#ac1e6867e357a44d0bb72b0bb44ea50c3900b0574e81e6e48d2317b6b45a6ffd" truffleruby
  ;;
*)
  colorize 1 "Unsupported operating system: $(uname -s)"
  return 1
  ;;
esac