The existing behavior is that the temporary output directoru (either default or as specified by "--build-root" argument) will be retained when either debug or verbose is set (debug is set by ENV variable JPACKAGE_DEBUG, and verbose is set by including the command line option --verbose).
We have agreed that this overloading of verbose option(or debug env variable) is not desired and will change it as follows:
1.) Retain the contents of the temporary output directory if it's location is set by the "--build-root" option. (Do not retain if default temp directory is created)
2.) Expand the meaning of the "--force" argument to allow overwriting both the output root directory and the temporary output directory.