wpkg --skip-same-version | -E ...

The --skip-same-version option is used with the --install command to avoid re-installing a package that is already installed. This is generally not necessary since you are not expected to request the system to install the same package with the same version over and over again.

By default the system re-installs (i.e. verifies, unpacks, and configures) a package when present after the --install command. This feature is useful when you try to fix a package that got corrupted in some way, however, if you are not trying to fix anything then the --skip-same-version option saves you some processing time.