Instll steam and the zfs_clone_send / zfs_clone_recv scripts.

nix/configuration/roles/steam/default.nix

@@ -0,0 +1,38 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  options.me.games = lib.mkOption {
+    type = lib.types.bool;
+    default = config.me.graphical;
+    example = true;
+    description = "Whether we want to install games.";
+  };
+
+  config = (
+    lib.mkMerge [
+      (lib.mkIf config.me.games {
+        allowedUnfree = [
+          "steam"
+          "steam-original"
+          "steam-unwrapped"
+          "steam-run"
+        ];
+
+        programs.steam = {
+          enable = true;
+          remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
+          # dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
+          localNetworkGameTransfers.openFirewall = true; # Open ports in the firewall for Steam Local Network Game Transfers
+        };
+      })
+    ]
+  );
+
+}