Can't create packages or disk images as PackageMaker.app can't be found

[bernard@…]

When tying to create a package (port mpkg <port>) I get errors like the following:

--->  Computing dependencies for libcmsis
--->  Creating pkg for libcmsis-master-2011.07.23.01
Warning: PackageMaker.app not found; you may need to install it or set packagemaker_path in macports.conf
Error: Target org.macports.pkg returned: shell command failed (see log for details)

The procedure to get these errors was sudo port selfupdate sudo port -f uninstall installed sudo port clean --all uninstalled sudo port -k mpkg <port>

This is after installing Xcode 4.3.1 from the AppStore and removing Xcode 4.2.1

A full log of the build that this is for can be found here ​http://paparazzi.gondwana.com.au/browse/PPZ-PBI-BMLION-34/log

[ryandesign (Ryan Carsten Schmidt)]

So ​install PackageMaker.