diff --git a/nix/steam_deck/configuration/home.nix b/nix/steam_deck/configuration/home.nix
index 3b905dd..696a772 100644
--- a/nix/steam_deck/configuration/home.nix
+++ b/nix/steam_deck/configuration/home.nix
@@ -10,6 +10,7 @@
     ./roles/2ship2harkinian
     ./roles/graphics
     ./roles/shipwright
+    ./roles/sm64ex
     ./roles/steam_rom_manager
     ./util/unfree_polyfill
   ];
diff --git a/nix/steam_deck/configuration/hosts/deck/default.nix b/nix/steam_deck/configuration/hosts/deck/default.nix
index a9cf960..b21f52f 100644
--- a/nix/steam_deck/configuration/hosts/deck/default.nix
+++ b/nix/steam_deck/configuration/hosts/deck/default.nix
@@ -12,6 +12,7 @@
     me.graphical = true;
     me.ship2harkinian.enable = true;
     me.shipwright.enable = true;
+    me.sm64ex.enable = true;
     me.steam_rom_manager.enable = false; # Steam rom manager UI does not render. I think it wants to be in an AppImage.
   };
 }
diff --git a/nix/steam_deck/configuration/roles/sm64ex/default.nix b/nix/steam_deck/configuration/roles/sm64ex/default.nix
new file mode 100644
index 0000000..3efb338
--- /dev/null
+++ b/nix/steam_deck/configuration/roles/sm64ex/default.nix
@@ -0,0 +1,50 @@
+{
+  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 [
+      (lib.mkIf config.me.graphical {
+        allowedUnfree = [ "sm64ex" ];
+
+        home.packages = with pkgs; [
+          (config.lib.nixGL.wrap sm64ex)
+        ];
+
+        # nixpkgs.overlays = [
+        #   (final: prev: {
+        #     sm4ex = prev.sm64ex.override {
+        #       baseRom.name = "SuperMario64.z64";
+        #     };
+        #   })
+        # ];
+
+        # TODO perhaps install ~/.local/share/sm64ex/sm64config.txt
+
+        home.persistence."/home/deck/.persist" = {
+          directories = [
+            {
+              directory = ".local/share/sm64ex";
+              method = "symlink";
+            }
+          ];
+        };
+      })
+    ]
+  );
+}