wpkg --status | -s

Short Hand

wpkg -s

Options Comments
--admindir Define the administration directory, where the database of the installed packages resides.
--debug Define a set of flags of things to print out for debug purposes.
--instdir Define the installation directory, where the data files are installed on the target.
--quiet Unused.
--root Define the installation root path.
--verbose Unused.

Since version 0.9.0 the --status command is actually a synonym of the --field command.

The old behavior of the --status command in wpkg can be replicated with the following command line:

wpkg --status <package name> X-Status

You may also want to check out the --is-installed command, which may be the test you are trying to achieve here.

For more information, please read the --field command documentation.