diff --git a/flake.lock b/flake.lock
index 13be019..c178ce1 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,29 +1,32 @@
 {
   "nodes": {
-    "flake-utils": {
+    "flake-parts": {
       "inputs": {
-        "systems": "systems"
+        "nixpkgs-lib": [
+          "nixpkgs"
+        ]
       },
       "locked": {
-        "lastModified": 1726560853,
-        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "lastModified": 1726153070,
+        "narHash": "sha256-HO4zgY0ekfwO5bX0QH/3kJ/h4KvUDFZg8YpkNwIbg1U=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "bcef6817a8b2aa20a5a6dbb19b43e63c5bf8619a",
         "type": "github"
       },
       "original": {
-        "id": "flake-utils",
-        "type": "indirect"
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1723637854,
-        "narHash": "sha256-med8+5DSWa2UnOqtdICndjDAEjxr5D7zaIiK4pn0Q7c=",
+        "lastModified": 1726937504,
+        "narHash": "sha256-bvGoiQBvponpZh8ClUcmJ6QnsNKw0EMrCQJARK3bI1c=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c3aa7b8938b17aebd2deecf7be0636000d62a2b9",
+        "rev": "9357f4f23713673f310988025d9dc261c20e70c6",
         "type": "github"
       },
       "original": {
@@ -35,24 +38,9 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
+        "flake-parts": "flake-parts",
         "nixpkgs": "nixpkgs"
       }
-    },
-    "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",
diff --git a/flake.nix b/flake.nix
index 9824f9d..fdd330c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,60 +3,82 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+	flake-parts = {
+		url = "github:hercules-ci/flake-parts";
+		inputs.nixpkgs-lib.follows = "nixpkgs";
+	};
   };
 
-  outputs = inputs@{ self, nixpkgs, flake-utils, ... }:
-    let
-		python-overlay = import ./python.nix;
-      systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
-      forAllSystems = function:
-        nixpkgs.lib.genAttrs systems (system: function (
-          import nixpkgs {
-            inherit system;
-            config.allowUnfree = true;
-            overlays = [
-				python-overlay
-            ]; 
-          }
-        ));
-    in {
-      packages = forAllSystems (pkgs: {
-	  	niar = pkgs.python3.buildPythonPackage {
-			name = "niar";
-			version = pyproject-toml.project.version;
-			src = ./.;
-			pyproject = true;
+  outputs = inputs@{flake-parts, ... }:
+	flake-parts.lib.mkFlake { inherit inputs; } {
+		# flake = let
+		# in {
+		# };
+		# devShells."x86_64-linux".default = pkgs.mkShell {
+		#         packages = with pkgs; [
+		#           (python3.withPackages (pypkgs: with pypkgs; [ 
+		#             amaranth
+		# 	  amaranth-boards
+		#           ]))
+		#           yosys
+		#           nextpnr
+		#           # simulators
+		#           iverilog
+		#           verilator
+		#           # support package
+		#           trellis
+		#           # loader
+		#           openfpgaloader
+		#           ecpdap # easier to poke probes.
+		#         ];
+		#       };
+		# };
 
-			build-system = [pkgs.python3.pdm-backend];
+		systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
 
-			propagatedBuildInpusts = [
-				pkgs.python3.amaranth
-				pkgs.python3.amaranth-boards
-			];
+		perSystem = {config, self', inputs', pkgs, system, ...}: {
+			packages.default = pkgs.python3.pkgs.buildPythonPackage {
+				name = "groovylight";
+				version = "0.0.1";
+				src = ./.;
+				format = "pyproject";
 
-			doCheck = true;
-			nativeCheckInputs = [python3.pkgs.pytestCheckHook];
+				build-system = [pkgs.python3.pkgs.pdm-backend];
+
+				propagatedBuildInputs = [
+					pkgs.python3.pkgs.amaranth
+					pkgs.python3.pkgs.amaranth-boards
+				];
+
+				doCheck = true;
+				nativeCheckInputs = with pkgs; [
+					python3.pkgs.pytestCheckHook
+					yosys
+					nextpnr
+					trellis
+					openfpgaloader
+				];
+			
+			};
+			devShells.default = pkgs.mkShell {
+		        packages = with pkgs; [
+		          (python3.withPackages (pypkgs: with pypkgs; [ 
+		            amaranth
+			  		amaranth-boards
+		          ]))
+				  self'.packages.default
+		          yosys
+		          nextpnr
+		          # simulators
+		          iverilog
+		          verilator
+		          # support package
+		          trellis
+		          # loader
+		          openfpgaloader
+		          ecpdap # easier to poke probes.
+		        ];
+			};
 		};
-      });
-      devShells = forAllSystems (pkgs: {
-        default = pkgs.mkShell {
-          packages = with pkgs; [
-            (python3.withPackages (pypkgs: with pypkgs; [ 
-              amaranth
-			  amaranth-boards
-            ]))
-            yosys
-            nextpnr
-            # simulators
-            iverilog
-            verilator
-            # support package
-            trellis
-            # loader
-            openfpgaloader
-            ecpdap # easier to poke probes.
-          ];
-        };
-      });
   };
 }
diff --git a/pyproject.toml b/pyproject.toml
index c2608df..20cfe75 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,6 +13,10 @@ requires-python = "==3.12.*"
 readme = "README.md"
 license = {text = "MIT"}
 
+[build-system]
+requires = ["pdm-backend"]
+build-backend = "pdm.backend"
+
 [tool.pdm.dev-dependencies] 
 dev = [
     "basedpyright",