Got my NixOS flake to run under WSL!

profiles/wsl/nixos-wsl/modules/docker-native.nix

@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+with builtins; with lib; {
+
+  options.wsl.docker-native = with types; {
+    enable = mkEnableOption "Native Docker integration in NixOS.";
+
+    addToDockerGroup = mkOption {
+      type = bool;
+      default = config.security.sudo.wheelNeedsPassword;
+      description = ''
+        Wether to add the default user to the docker group.
+
+        This is not recommended, if you have a password, because it essentially permits unauthenticated root access.
+      '';
+    };
+  };
+
+  config =
+    let
+      cfg = config.wsl.docker-native;
+    in
+    mkIf (config.wsl.enable && cfg.enable) {
+      nixpkgs.overlays = [
+        (self: super: {
+          docker = super.docker.override { iptables = pkgs.iptables-legacy; };
+        })
+      ];
+
+      environment.systemPackages = with pkgs; [
+        docker
+        docker-compose
+      ];
+
+      virtualisation.docker.enable = true;
+
+      users.groups.docker.members = lib.mkIf cfg.addToDockerGroup [
+        config.wsl.defaultUser
+      ];
+    };
+}