diff --git a/.gitignore b/.gitignore
index 73d73ac..fc37d40 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,5 @@ __pycache__
 *.egg-info
 /build
 .coverage
-htmlcov
\ No newline at end of file
+htmlcov
+.DS_Store
diff --git a/default.nix b/default.nix
index 477b928..8ee3bf3 100644
--- a/default.nix
+++ b/default.nix
@@ -1,9 +1,12 @@
 {
-  pkgs? import <nixpkgs> {},
-  gitignore-src ? import ./nix/gitignore.nix { inherit pkgs; },
+  antlr4_10,
+  black,
+  lib,
+  nix-gitignore,
+  buildPythonPackage,
 }:
 
-with pkgs; with python3.pkgs; let
+let
   antlr4_10-python3-runtime = buildPythonPackage rec {
     pname = "antlr4-python3-runtime";
     inherit (antlr4_10.runtime.cpp) version src;
@@ -25,7 +28,7 @@ in buildPythonPackage rec {
   version_list = builtins.match ''.+''\n__version__ = "([^"]+)"''\n.+''$'' version_file;
   version = builtins.head version_list;
 
-  src = gitignore-src.gitignoreSource ./.;
+  src = nix-gitignore.gitignoreSourcePure ./.gitignore ./.;
 
   doCheck = false;
   PIP_DISABLE_PIP_VERSION_CHECK = "1";
@@ -36,10 +39,10 @@ in buildPythonPackage rec {
   ];
 
   preBuild = ''
-  make antlr
+    make antlr
   '';
 
   propagatedBuildInputs = [
     antlr4_10-python3-runtime
   ];
-}
\ No newline at end of file
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..af6d1a7
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "narHash": "sha256-C36QmoJd5tdQ5R9MC1jM7fBkZW9zBUqbUCsgwS6j4QU=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "c1be43e8e837b8dbee2b3665a007e761680f0c3d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-23.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..79218f0
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,49 @@
+# Copyright 2024 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+{
+  inputs = {
+    nixpkgs.url = github:nixos/nixpkgs/nixos-23.11;
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: {
+    # Helper functions
+    forAllSystems = function:
+      nixpkgs.lib.genAttrs [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ] (
+        system:
+          function (import nixpkgs {
+            inherit system;
+          })
+      );
+
+    # Outputs
+    packages = self.forAllSystems (pkgs: let
+      callPackage = pkgs.lib.callPackageWith (pkgs // self.packages.${pkgs.system});
+      callPythonPackage = pkgs.lib.callPackageWith (pkgs // pkgs.python3.pkgs // self.packages.${pkgs.system});
+    in
+      rec {
+        ioplace_parser = callPythonPackage ./default.nix {};
+        default = ioplace_parser;
+      }
+    );
+  };
+}