Add role to build sm64ex.

nix/configuration/configuration.nix

@@ -59,6 +59,7 @@
     ./roles/kodi
     ./roles/ansible
     ./roles/bluetooth
+    ./roles/sm64ex
   ];
 
   nix.settings.experimental-features = [

nix/configuration/hosts/odo/default.nix

@@ -65,4 +65,6 @@
   me.wireguard.deactivated = [ "wgf" ];
   me.zrepl.enable = true;
   me.zsh.enable = true;
+
+  me.sm64ex.enable = true;
 }

nix/configuration/roles/sm64ex/default.nix

@@ -0,0 +1,41 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  options.me = {
+    sm64ex.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install sm64ex.";
+    };
+  };
+
+  config = lib.mkIf config.me.sm64ex.enable (
+    lib.mkMerge [
+      {
+        allowedUnfree = [ "sm64ex" ];
+      }
+      (lib.mkIf config.me.graphical {
+        environment.systemPackages = with pkgs; [
+          sm64ex
+        ];
+
+        nixpkgs.overlays = [
+          (final: prev: {
+            sm4ex = prev.sm64ex.override {
+              baseRom.name = "SuperMario64.z64";
+            };
+          })
+        ];
+
+      })
+    ]
+  );
+}