runCommand -package:shake -package:amazonka-cloudwatch-events -is:exact -package:mongoDB -package:structured-cli -package:graphviz -package:github-release -package:hledger -package:quickcheck-state-machine package:xmonad-contrib

Given a list of command/action pairs, prompt the user to choose a command using dmenu and return the corresponding action.
Given the name of a command from defaultCommands, return the corresponding action (or the null action if the command is not found).
Given a list of command/action pairs, prompt the user to choose a command using dmenu-compatible launcher and return the corresponding action. See X.U.Dmenu for compatible launchers.