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, 6 insertions, 1 deletions

diff --git a/pkgs/games/default.nix b/pkgs/games/default.nix
index cef568cf..b775610d 100644
--- a/pkgs/games/default.nix
+++ b/pkgs/games/default.nix
@@ -25,12 +25,17 @@ let
         description = "Available collections of games.";
       };
     };
+
+    config._module.args.pkgs = let
+      buildSupport = import ./build-support {
+        callPackage = lib.callPackageWith (pkgs // buildSupport);
+      };
+    in buildSupport // pkgs;
   };
 
 in (pkgs.lib.evalModules {
   modules = [
     (if config == null then configFilePath else config)
     baseModule ./humblebundle ./steam ./itch
-    { config._module.args.pkgs = pkgs; }
   ];
 }).config.packages