Installing Cinnamon on f21 fails with dependency problems

[Alex Regan]

Hi,
I have a fedora21 workstation install with gnome3, and trying to replace 
the desktop with Cinnamon.

Running 'yum groupinstall "Cinnamon Desktop"' results in the following

# yum groupinstall "Cinnamon Desktop"
[package list trimmed...]
--> Running transaction check
---> Package blas.x86_64 0:3.5.0-10.fc21 will be installed
---> Package hawtjni-runtime.noarch 0:1.10-3.fc21 will be installed
---> Package jansi-native.x86_64 0:1.5-8.fc21 will be installed
--> Processing Conflict: fedora-release-workstation-21-2.noarch 
conflicts fedora-release-nonproduct
--> Processing Conflict: fedora-release-nonproduct-21-2.noarch conflicts 
fedora-release-workstation
--> Finished Dependency Resolution
Error: fedora-release-nonproduct conflicts with 
fedora-release-workstation-21-2.noarch
Error: fedora-release-workstation conflicts with 
fedora-release-nonproduct-21-2.noarch
  You could try using --skip-broken to work around the problem
  You could try running: rpm -Va --nofiles --nodigest

Any ideas how to proceed? It's not normal to skip-broken, so I thought I 
would see if there was a more common problem here...

Thanks,
Alex