runCommand -package:structured-cli -package:github-release -package:io-streams -package:graphviz -package:mongoDB -package:process -package:xmonad-contrib -package:shake -package:quickcheck-state-machine -package:pandoc-plot is:exact

Either calls the given continuation, prints help text and calls exitSuccess, or prints an error and calls exitFailure. See runSubcommand for details on subcommand support.
Runs a command using the shell.