Description of problem:
That directory does not seem to contain a Fedora Core installation tree.
The log says:
Warning: unable to access /mnt/source/images/stage2.img
Quite rightly too. There is not stage2.img; the closest thing is minstg2.img.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. NFS install
Can't find stage2.img
linking stage2.img to minstg2.img allows proceeding with a text install.
This was caused by a typo in the image making scripts. Should be fixed in Rawhide.