This might be a dumb question but, how is everyone creating their install media?  Every time I try I get this error:
	Code:
	Couldn't extract BaseSystem to path: /Volumes/Install macOS Beta/BaseSystem
The bless of the installer disk failed.
 These are the steps I followed:
	Code:
	hdiutil create -o /tmp/BigSur.cdr -size 10000m -layout SPUD -fs HFS+J
hdiutil attach /tmp/BigSur.cdr.dmg -noverify -mountpoint /Volumes/install_build
sudo '/Applications/Install macOS Beta.app/Contents/Resources/createinstallmedia' --volume /Volumes/install_build
 At which point I get the error above.