diff --git a/hosts/containers/oparl/default.nix b/hosts/containers/oparl/default.nix
index a1abf1fb..ca49b3f8 100644
--- a/hosts/containers/oparl/default.nix
+++ b/hosts/containers/oparl/default.nix
@@ -9,19 +9,19 @@ let
 in
 {
   microvm = {
-    hypervisor = "cloud-hypervisor";
+    hypervisor = "kvmtool";
 
     shares = [ {
       source = "/nix/store";
       mountPoint = "/nix/.ro-store";
       tag = "store";
-      proto = "virtiofs";
+      proto = "9p";
       socket = "store.socket";
     } ] ++ map (dir: {
       source = "/var/lib/microvms/staging-data-hoarder/${dir}";
       mountPoint = "/${dir}";
       tag = dir;
-      proto = "virtiofs";
+      proto = "9p";
       socket = "${dir}.socket";
     }) [ "etc" "home" "var"];
 
@@ -90,4 +90,6 @@ in
       git push origin master
     '';
   };
+
+  system.stateVersion = "22.05";
 }