From 45b8e831287dcd40dff15b9da93bf8626d32d994 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maciej=20Kr=C3=BCger?= <mkg20001@gmail.com>
Date: Thu, 11 Feb 2021 11:02:45 +0100
Subject: [PATCH] qemu-vm: add virtualisation.fileSystems to allow extra vm
 mounts

---
 nixos/modules/virtualisation/qemu-vm.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index bf3615f2fe7..5360cff22f3 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -7,7 +7,7 @@
 # the VM in the host.  On the other hand, the root filesystem is a
 # read/writable disk image persistent across VM reboots.
 
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, options, ... }:
 
 with lib;
 with import ../../lib/qemu-flags.nix { inherit pkgs; };
@@ -266,6 +266,8 @@ in
 
   options = {
 
+    virtualisation.fileSystems = options.fileSystems;
+
     virtualisation.memorySize =
       mkOption {
         default = 384;
@@ -659,6 +661,7 @@ in
     # attribute should be disregarded for the purpose of building a VM
     # test image (since those filesystems don't exist in the VM).
     fileSystems = mkVMOverride (
+      cfg.fileSystems //
       { "/".device = cfg.bootDevice;
         ${if cfg.writableStore then "/nix/.ro-store" else "/nix/store"} =
           { device = "store";