diff --git a/.gitignore b/.gitignore
index e49973e..a55f26d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .direnv
 .DS_Store
 node_modules
+result
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..89b1f3d
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1775403759,
+        "narHash": "sha256-cGyKiTspHEUx3QwAnV3RfyT+VOXhHLs+NEr17HU34Wo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "5e11f7acce6c3469bef9df154d78534fa7ae8b6c",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..9287134
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,50 @@
+{
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    supportedSystems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin"];
+    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    nixpkgsFor = forAllSystems (system:
+      import nixpkgs {
+        inherit system;
+      });
+  in {
+    packages = forAllSystems (system: let
+      pkgs = nixpkgsFor."${system}";
+    in {
+      default = pkgs.stdenv.mkDerivation {
+        pname = "tinysub";
+        version = "0.1.0";
+        src = ./.;
+
+        nativeBuildInputs = with pkgs; [
+          monolith
+        ];
+
+        buildPhase = ''
+          runHook preBuild
+
+          monolith src/index.html -o index.html
+
+          runHook postBuild
+        '';
+
+        installPhase = ''
+          runHook preInstall
+
+          mkdir -p $out
+          cp index.html $out/
+
+          runHook postInstall
+        '';
+      };
+    });
+
+    formatter = forAllSystems (system: nixpkgsFor."${system}".alejandra);
+
+    overlays.default = final: prev: {
+      tinysub = self.packages.${final.system}.default;
+    };
+  };
+}