Trying to figure out 9p filesystem

[Chad Nelson]

I am trying to work out a way to mount a 9p filesystem in Guix. I have tried 
pulling apart pieces of guix/vm.scm, but can’t seem to figure out how it is 
setting up the 'file-system->mount_tag’ option for the file-system decorations 
it uses. 

https://paste.debian.net/1256544/ <https://paste.debian.net/1256544/>

Above is the section of vm.scm that seems to have no problem declaring the 
mount tag as just “(device “store”)”.