Added (90%)template flake based nix development shell

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1752866191,
+        "narHash": "sha256-NV4S2Lf2hYmZQ3Qf4t/YyyBaJNuxLPyjzvDma0zPp/M=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "f01fe91b0108a7aff99c99f2e9abbc45db0adc2a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -1,7 +1,24 @@
-{pkgs ? import <nixpkgs> {}}:
+# Template: https://nixos-and-flakes.thiscute.world/development/intro
+{
+  description = "TinyEMU Nix Dev Shell (Flake-Based)";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
+  };
+
+  outputs = {nixpkgs, ...}: let
+    # system should match the system you are running on
+    system = "x86_64-linux";
+  in {
+    devShells."${system}".default = let
+      pkgs = import nixpkgs {
+        inherit system;
+      };
+    in
       pkgs.mkShell {
-  # nativeBuildInputs is usually what you want -- tools you need to run
-  nativeBuildInputs = with pkgs.buildPackages; [
+        packages = with pkgs; [
           emscripten
         ];
+      };
+  };
 }