add flake.nix

flake.nix

@@ -0,0 +1,41 @@
+{
+  inputs = {
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, fenix, flake-utils, nixpkgs }:
+    flake-utils.lib.eachDefaultSystem (system: {
+      packages.default =
+        let
+          toolchain = fenix.packages.${system}.minimal.toolchain;
+          pkgs = nixpkgs.legacyPackages.${system};
+          nativeBuildInputs = with pkgs; [ pkg-config libclang ];
+          buildInputs       = with pkgs; [ libclang ];
+        in
+
+          (pkgs.makeRustPlatform {
+            cargo = toolchain;
+            rustc = toolchain;
+          }).buildRustPackage {
+          pname = "taggart";
+          version = "0.1.0";
+
+          src = ./.;
+
+          inherit buildInputs nativeBuildInputs;
+
+          cargoLock = {
+            lockFile = ./Cargo.lock;
+            outputHashes = {
+              "enolib-0.5.0" = "sha256-NauWYmn1bUAJrIKJ2JN2XjcLsQehE3cjAxBOQ+Nme70=";
+              "tengri-0.1.0" = "sha256-jo7WovOsW/hpMPWuXBZYiaZukxXJUsbfCrjbNBe/5ww=";
+            };
+          };
+        };
+    });
+}