add nix flake

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -8,3 +8,6 @@ target/
 
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
+
+# Direnv
+.direnv/

flake.lock

@@ -0,0 +1,82 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1742669843,
+        "narHash": "sha256-G5n+FOXLXcRx+3hCJ6Rt6ZQyF1zqQ0DL0sWAMn2Nk0w=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "1e5b653dff12029333a6546c11e108ede13052eb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1742870002,
+        "narHash": "sha256-eQnw8ufyLmrboODU8RKVNh2Mv7SACzdoFrRUV5zdNNE=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "b4c18f262dbebecb855136c1ed8047b99a9c75b6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

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 
+                ];
+            };
+        }
+    );
+}