nix support

.gitignore

@@ -1,3 +1,6 @@
 config_priv/*
 !config_priv/README.md
 !config_priv/examples
+
+# nix
+result

README.md

@@ -42,6 +42,16 @@ multios-usb -l
 
 # Install to the selected device (replace sdX with your target device)
 sudo multios-usb /dev/sdX
+```
+**Nix/NixOS**
+
+```nix
+# run without permanent install (flakes must be enabled)
+sudo nix run github:Mexit/MultiOS-USB -- /dev/sdX
+
+# create shell with MultiOS-USB available
+nix shell github:Mexit/MultiOS-USB
+
 ```
 
 **From GitHub - Linux console**

flake.nix

@@ -0,0 +1,66 @@
+{
+  description = "MultiOS-USB: One device with muliple ISO/WIM files";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    gitignore = {
+      url = "github:hercules-ci/gitignore.nix";
+      # Use the same nixpkgs
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    inputs@{ flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [
+      ];
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "aarch64-darwin"
+        "x86_64-darwin"
+      ];
+      perSystem =
+        {
+          config,
+          self',
+          inputs',
+          pkgs,
+          system,
+          ...
+        }:
+        let
+          inherit (inputs.gitignore.lib) gitignoreSource;
+        in
+        {
+          packages.default = pkgs.stdenv.mkDerivation rec {
+            src = gitignoreSource ./.;
+            name = "multios-usb";
+            buildInputs = with pkgs; [
+              gnutar
+              xz
+              bzip2
+              gptfdisk
+              util-linux
+              exfat
+              dosfstools
+            ];
+            nativeBuildInputs = with pkgs; [ makeWrapper ];
+            buildPhase = ''
+              mkdir -p $out/bin
+              cp -r $src $out/share
+              ln -s $src/multios-usb.sh $out/bin/multios-usb
+            '';
+            postFixup = ''
+              wrapProgram $out/bin/multios-usb \
+                --chdir $out/share \
+                --prefix PATH : ${pkgs.lib.makeBinPath buildInputs}
+            '';
+          };
+        };
+      flake = {
+      };
+    };
+}

multios-usb.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 #  MultiOS-USB © 2020-2025 MexIT
 #  https://gitlab.com/MultiOS-USB
@@ -34,6 +34,7 @@ trap '{
 }' EXIT
 
 cd "$(dirname "$(readlink -f "$0")")"
+
 echo "Arguments: $*" > $log_file
 
 showUsage() {