Right now we assume it's a CD/DVD mounted to /run/install/repo, we should actually check what is mounted there and show nfs if that's what's mounted.
Patch posted.
anaconda-18.28-1.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/FEDORA-2012-17823/anaconda-18.28-1.fc18
Package anaconda-18.28-1.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing anaconda-18.28-1.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-17823/anaconda-18.28-1.fc18 then log in and leave karma (feedback).
Confirmed this is fixed in TC9, 18.28 went stable so closing.