The packagerb utility is used to re-build an installation package in the batch mode (from the command line or build scripts). After you have created an installation package using Packager and saved its project file, you can build the package with the command:
packagerb Packager-project-file [-target target-file] [-version version]
The -target option specifies the name of the target file. If the option is omitted, the name shown on the last page of JetPackII is used.
The -version option may be used for changing the product version displayed by the installation wizard of Excelsior Installer.
packagerb is useful for minor updates, e.g. when only particular files are modified, provided that the overall structure of the project and installation settings were not changed.