machines: Add attribute to build a VM.

This is to make it easier testing various vuizvui machine
configurations for example with my machine "mmrnmhrm" by using the
following command:

nix-build machines -A aszlig.mmrnmhrm

The build product is a VM that can be started using:

./result/bin/run-*-vm

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/machines/default.nix b/machines/default.nix
index 9ec4a207..0906a5e9 100644
--- a/machines/default.nix
+++ b/machines/default.nix
@@ -58,6 +58,10 @@ let
     use = {
       imports = [ config ] ++ import ../modules/module-list.nix;
     };
+    vm = (import "${nixpkgs}/nixos" {
+      inherit system;
+      configuration = use;
+    }).vm;
   };
 
 in {