games/invisigun-heroes: Factor out into buildUnity

There are a lot of Unity games out there, so it's a good idea to have a
generic builder just for Unity, which we then can apply to a lot more
games.

Right now this is a pretty basic abstraction which I've only tested with
Invisigun Heroes.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/pkgs/games/build-support/default.nix b/pkgs/games/build-support/default.nix
new file mode 100644
index 00000000..8b6b466d
--- /dev/null
+++ b/pkgs/games/build-support/default.nix
@@ -0,0 +1,5 @@
+{ callPackage, ... }:
+
+{
+  buildUnity = callPackage ./build-unity.nix {};
+}