From 24f92176fbfc68803657904c70a63340a0343a57 Mon Sep 17 00:00:00 2001
From: matthewcroughan <matt@croughan.sh>
Date: Mon, 14 Jul 2025 22:26:58 +0100
Subject: [PATCH] nixos/kryoflux: init

---
 nixos/modules/hardware/kryoflux.nix | 33 +++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 nixos/modules/hardware/kryoflux.nix

diff --git a/nixos/modules/hardware/kryoflux.nix b/nixos/modules/hardware/kryoflux.nix
new file mode 100644
index 000000000000..fc46f2d0bbf4
--- /dev/null
+++ b/nixos/modules/hardware/kryoflux.nix
@@ -0,0 +1,33 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.programs.kryoflux;
+
+in
+{
+  options.programs.kryoflux = {
+    enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Enables kryoflux udev rules, ensures 'floppy' group exists. This is a
+        prerequisite to using devices supported by kryoflux without being root,
+        since kryoflux device descriptors will be owned by floppy through udev.
+      '';
+    };
+    package = lib.mkPackageOption pkgs "kryoflux" { };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.udev.packages = [ cfg.package ];
+    environment.systemPackages = [ cfg.package ];
+    users.groups.floppy = { };
+  };
+
+  meta.maintainers = with lib.maintainers; [ matthewcroughan ];
+}