The VSPAT project has had a long time strategic dependency on the core framework of the 'Feature Builder Power Tool' (called the 'Feature Extension Runtime') created by the Visual Studio team. Available from here:
The dependency is a binary dependency and the redistribution of that dependency has been a VSIX extension that was supported for VS2010.
Microsoft has not released an update to the Feature Builder Power Tool for VS2012, the extension appears to have been abandoned.
In order to ship a new version of NuPattern that is compatible with VS2012, this dependency requires removal.
There is a planned resolution in motion with Microsoft at present.