Description of problem:
Start unattended installation of qemu-kvm guest using attached ks file.

Version-Release number of selected component:
anaconda-22.7-1

The following was filed automatically by anaconda:
anaconda 22.7-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/deviceaction.py", line 608, in __init__
    raise ValueError("this device's formatting cannot be modified")
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 883, in initializeDisk
    destroy_action = ActionDestroyFormat(disk)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 847, in clearPartitions
    self.initializeDisk(disk)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/kickstart.py", line 589, in execute
    storage.clearPartitions()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/kickstart.py", line 1932, in doKickstartStorage
    ksdata.clearpart.execute(storage, ksdata, instClass)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/tui/spokes/storage.py", line 368, in execute
    doKickstartStorage(self.storage, self.data, self.instclass)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/tui/hubs/summary.py", line 62, in setup
    spoke.execute()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/tui/__init__.py", line 171, in setup
    should_schedule = obj.setup(self.ENVIRONMENT)
  File "/sbin/anaconda", line 1203, in <module>
    anaconda._intf.setup(ksdata)
ValueError: this device's formatting cannot be modified

Additional info:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   inst.repo=http://download.eng.brq.redhat.com/pub/fedora/development/rawhide/x86_64/os/ ks=file:/minimal-install.ks       console=tty0 console=ttyS0,115200
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.17.0-0.rc7.git3.1.fc22.x86_64
product:        Fedora"
release:        Cannot get release name.
type:           anaconda
version:        Fedora