F22 workstation install - Xfce desktop

[Robert Moskowitz]

I am attempting a workstation installation on my rebuilt Lenovo x120e 
notebook.

I want the Xfce desktop.  I download the workstation netinstall x86_64 
iso and built a DVD.

I downloaded:

mirrors.kernel.org/fedora/releases/22/Workstation/x86_64/os/

to my repos server and also:

mirrors.kernel.org/fedora/updates/22/x86_64/  (less debug and drpms 
directories)

I booted the install image, set up the partitions as I like (smaller /, 
larger swap and /home).

I specific my local OS repo and the updates as 'update'.  I selected the 
Xfce desktop (deselecting all additional groups for starters) and get an 
error:

Error checking software selection.

So how do I do a local install of Xfce?

thank you.