It seems as if the default behavior for a build script is to not invoke a task more than once even when it is specified in that order. For example:

Task . Clean, Build, Clean
Task Clean {
   #Cleanup code
}
Task Build {
   #Build code
}

Is there a way to override this behavior? The use case for me is that I want my CI engine to clean up the environment (if needed), build a fresh power shell module, do some tests and then clean up after itself so as not to leave potentially broken modules sitting around