Add a role for mounting the nix store over 9pfs.

This is useful for virtual machines since we can have a persistent /nix/store on the host machine.

nix/configuration/hosts/odo/disk-config.nix

@@ -1,14 +1,8 @@
 # Manual Step:
 #   Check if drive supports 4kn: nvme id-ns -H /dev/nvme0n1
 #   Format the drive to 4kn: nvme format --lbaf=1 /dev/nvme0n1
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}:
 
-lib.mkIf (!config.me.buildingIso) {
+{
   disko.devices = {
     disk = {
       main = {