diff --git a/modules/nixos/microvm/guest.nix b/modules/nixos/microvm/guest.nix
index db43765..d630b61 100644
--- a/modules/nixos/microvm/guest.nix
+++ b/modules/nixos/microvm/guest.nix
@@ -38,7 +38,7 @@
             source = "/nix/store";
             mountPoint = "/nix/.ro-store";
             tag = "ro-store";
-            proto = "virtiofs";
+            inherit (config.microvm) proto;
           }
         ];
       };
diff --git a/modules/nixos/microvm/host.nix b/modules/nixos/microvm/host.nix
index 2de0116..8057eb2 100644
--- a/modules/nixos/microvm/host.nix
+++ b/modules/nixos/microvm/host.nix
@@ -1,5 +1,13 @@
 { inputs, lib, ... }:
 {
+  flake.modules.nixos.base.options.microvm.proto = lib.mkOption {
+    type = lib.types.enum [
+      "9p"
+      "virtiofs"
+    ];
+    default = "virtiofs";
+  };
+
   flake.modules.nixos.core =
     { config, ... }:
     let
@@ -27,6 +35,7 @@
             {
               networking.hostName = name;
               networking.domain = config.networking.fqdn;
+              microvm.proto = config.microvm.proto;
             }
           ];
         }) vms;
diff --git a/modules/services/forgejo.nix b/modules/services/forgejo.nix
index 3308228..982bd1d 100644
--- a/modules/services/forgejo.nix
+++ b/modules/services/forgejo.nix
@@ -71,7 +71,7 @@ in
             source = "/var/lib/forgejo";
             mountPoint = "/var/lib/forgejo";
             tag = "forgejo";
-            proto = "virtiofs";
+            inherit (config.microvm) proto;
           }
         ];
 
diff --git a/modules/services/navidrome.nix b/modules/services/navidrome.nix
index 4f0fea4..61eab83 100644
--- a/modules/services/navidrome.nix
+++ b/modules/services/navidrome.nix
@@ -25,7 +25,7 @@ in
           source = "/home/peter/annex";
           mountPoint = "/var/lib/navidrome/annex";
           tag = "music";
-          proto = "virtiofs";
+          inherit (config.microvm) proto;
         }
       ];
     };