From Fedora Project Wiki
The following worked for me for using livemedia-creator: livemedia-creator --make-iso --no-virt --ks /usr/share/spin-kickstarts/fedora-live-xfce.ks I didn't need to flatten the ks files. I didn't need to install any dependencies, but that might be because I typically have the kitchen sink installed on my machines. If you have a local copy of the repos, you want to edit the repo commands in the ks files so that you don't download stuff again and use a bunch of extra disk space.