Offer option of an erofs nix store image

[nixos-qemu-vm-isolation] / README.md

diff --git a/README.md b/README.md
index c0aea3118c77365ecab039b34c239d44abe64e51..6a6fb436787d2171bad51b2bc9c27c83db167785 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 Isolate NixOS QEMU VMs from each other and from the host by using a
-squashfs for the VM's /nix/store that contains only the VM's dependencies
+private /nix/store image that contains only the VM's dependencies
 (like the installer has) rather than a virtio mount of the host's entire
 /nix/store.
 
-**Update:** `virtualisation.useNixStoreImage` exists now!  But it doesn't
-work!  :(  See the note in `checks/mount-grep.nix`
+**Update:** `virtualisation.useNixStoreImage` exists now!  But it builds
+the store image at runtime, rather that at build-time, drastically
+increasing VM start-up time.