diff --git a/.gitignore b/.gitignore
index 53ff183..8ce9bfc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 test/taskchampion.sqlite3
 tasksquire
 test/*.sqlite3*
+result
diff --git a/flake.lock b/flake.lock
index 24fd1d1..f9ae013 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,58 +1,59 @@
 {
   "nodes": {
-    "flake-utils": {
+    "flake-parts": {
       "inputs": {
-        "systems": "systems"
+        "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "lastModified": 1769996383,
+        "narHash": "sha256-AnYjnFWgS49RlqX7LrC4uA+sCCDBj0Ry/WOJ5XWAsa0=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "57928607ea566b5db3ad13af0e57e921e6b12381",
         "type": "github"
       },
       "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1770197578,
-        "narHash": "sha256-AYqlWrX09+HvGs8zM6ebZ1pwUqjkfpnv8mewYwAo+iM=",
-        "owner": "NixOS",
+        "lastModified": 1771369470,
+        "narHash": "sha256-0NBlEBKkN3lufyvFegY4TYv5mCNHbi5OmBDrzihbBMQ=",
+        "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "00c21e4c93d963c50d4c0c89bfa84ed6e0694df2",
+        "rev": "0182a361324364ae3f436a63005877674cf45efb",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
+        "owner": "nixos",
         "ref": "nixos-unstable",
-        "type": "indirect"
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1769909678,
+        "narHash": "sha256-cBEymOf4/o3FD5AZnzC3J9hLbiZ+QDT/KDuyHXVJOpM=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "72716169fe93074c333e8d0173151350670b824c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
       }
     },
     "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 2848139..e6cbd16 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,18 +2,16 @@
   description = "Tasksquire";
 
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = import nixpkgs {
-          inherit system;
-        };
+  outputs = inputs@{ self, nixpkgs, flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
 
-        tasksquire = pkgs.buildGoModule {
+      perSystem = { config, self', inputs', pkgs, system, ... }: {
+        packages.tasksquire = pkgs.buildGoModule {
           pname = "tasksquire";
           version = "0.1.0";
           src = ./.;
@@ -32,13 +30,13 @@
             mainProgram = "tasksquire";
           };
         };
-      in
-      {
-        packages.default = tasksquire;
-        packages.tasksquire = tasksquire;
-        apps.default = flake-utils.lib.mkApp { drv = tasksquire; };
 
+        # Set the default package
+        packages.default = self'.packages.tasksquire;
+
+        # Development shell
         devShells.default = pkgs.mkShell {
+          inputsFrom = [ self'.packages.tasksquire ];
           buildInputs = with pkgs; [
             go_1_24
             gcc
@@ -50,14 +48,9 @@
             go-tools
             gotests
             delve
-            taskwarrior3
-            timewarrior
           ];
           CGO_CFLAGS = "-O";
         };
-
-        # Backward compatibility
-        devShell = self.devShells.${system}.default;
-      });
+      };
+    };
 }
-