diff --git a/os/dev/default.nix b/os/dev/default.nix
index 4311fd7..6c7b92a 100644
--- a/os/dev/default.nix
+++ b/os/dev/default.nix
@@ -6,6 +6,10 @@
       users.users.geoffrey.extraGroups = [ "docker" ];
     })
     (lib.mkIf config.frogeye.dev.vm {
+      # Required to mount filesystems. Also need to add
+      # <binary path="/run/current-system/sw/bin/virtiofsd"/>
+      # to the VM's filesystem XML config
+      environment.systemPackages = [ pkgs.virtiofsd ];
       virtualisation = {
         libvirtd.enable = true;
         spiceUSBRedirection.enable = true;