runCommand -package:options -package:shake -package:wai-app-static -package:shake-plus -package:pandoc-plot -package:xmonad-contrib -package:process -package:quickcheck-state-machine -package:io-streams -package:hledger is:exact

Run an external command on the specified DotRepr. Remember to use hSetBinaryMode on the Handle for the output function if necessary. If the command was unsuccessful, then a GraphvizException is thrown. For performance reasons, a temporary file is used to store the generated Dot code. As such, this is only suitable for local commands.
Run command against the database and return its result