add nix flake

flake.nix

@@ -0,0 +1,32 @@
+{
+    inputs = {
+        nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+        flake-utils.url = "github:numtide/flake-utils";
+        rust-overlay = {
+            url = "github:oxalica/rust-overlay";
+            inputs = {
+                nixpkgs.follows = "nixpkgs";
+            };
+        };
+    };
+
+    outputs = { self, nixpkgs, flake-utils, rust-overlay }:
+    flake-utils.lib.eachDefaultSystem (system:
+        let
+            overlays = [ (import rust-overlay ) ];
+            pkgs = import nixpkgs {
+                inherit system overlays;
+            };
+        in
+        with pkgs;
+        {
+            devShells.default = mkShell {
+                buildInputs = [ 
+                    rust-bin.stable.latest.default
+                    pkgs.pkg-config
+                    pkgs.alsa-lib 
+                ];
+            };
+        }
+    );
+}