From a02bb00156086b45e68c1112008db506734f8649 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 19 Dec 2016 14:16:03 +0100
Subject: [PATCH] Enable virtualisation.writableStore by default
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This works around:

  machine: must succeed: nix-store -qR /run/current-system | grep nixos-
  machine# error: changing ownership of path ‘/nix/store’: Invalid argument

Probably Nix shouldn't be anal about the ownership of the store unless
it's trying to build/write to the store.

http://hydra.nixos.org/build/45093872/nixlog/17/raw
(cherry picked from commit 57a0f140643cde409022e297ed05e05f8d34d778)
---
 nixos/modules/virtualisation/qemu-vm.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index bd964723d40..6423432c78b 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -274,7 +274,7 @@ in
 
     virtualisation.writableStore =
       mkOption {
-        default = false;
+        default = true; # FIXME
         description =
           ''
             If enabled, the Nix store in the VM is made writable by