Why Can't I Add com.ibm.team.repository.common in the Extensions Workshop?

I have recently been trying to go through the extensions workshop so that I can develop some custom operational behaviors. When following the tutorial, I ran into an issue where the tutorial was directing me to specify a plug-in dependency of "com.ibm.team.repository.common". Presumably, this plug-in is part of the SDK. Although I've unzipped the 4.0.6 SDK and have added all of the files to my jazz search like the tutorial directs me to do, I am unable to add that specific plug-in to the project dependencies list. There are several plug-ins that have that name listed as their prefix, but they have other words tacked onto the end as well so they aren't the exact plug-in that the Workshop directs me to use.

I tried just skipping that particular plug-in, but then some of the code from the Workshop doesn't work because it evidently specifies data types that are defined within that particular plug-in. I have a coworker who has successfully gone through this workshop and he is able to add the indicated dependency without a problem. The only difference I can think of is that he started it using the 4.0.4 SDK. I don't know if that's the issue or not though. When I visually scan through the list of plug-ins that were loaded when I changed my target to the SDK, I can see the desired plug-in in the list. It just isn't offered as an option from within the "Dependencies" tab of my project.

Has anyone had this issue? Can anyone tell me how I can get the missing dependency to show up?