diff --git a/nix/modules/unfree-packages.nix b/nix/modules/unfree-packages.nix
new file mode 100644
index 0000000..498095e
--- /dev/null
+++ b/nix/modules/unfree-packages.nix
@@ -0,0 +1,16 @@
+{ lib, config, ... }:
+let
+  inherit (builtins) elem;
+  inherit (lib) mkOption getName;
+  inherit (lib.types) listOf str;
+  predicate = pkg: elem (getName pkg) config.allowedUnfreePackages;
+in
+{
+  options.allowedUnfreePackages = mkOption {
+    type = listOf str;
+    default = [ ];
+  };
+  config.flake.modules.nixos.default = {
+    nixpkgs.config.allowUnfreePredicate = predicate;
+  };
+}