Replace unity module with unity3d

modules/dev/unity.nix

@@ -1,10 +0,0 @@
-# I don't often use unity except for team projects. On my own, I prefer rolling
-# my own (or godot).
-
-{ config, lib, pkgs, ... }:
-
-{
-  environment.systemPackages = with pkgs; [
-    unity3d
-  ];
-}

modules/dev/unity3d.nix

@@ -0,0 +1,9 @@
+# I don't often use Unity, but I've worked with others who do. I'll commonly
+# reach for it for group projects.
+
+{ config, lib, pkgs, ... }:
+{
+  my.packages = with pkgs; [
+    unity3d
+  ];
+}