From f74ec891c20622810195d7c8f0092a80204a555f Mon Sep 17 00:00:00 2001
From: Stefan Kreutz <mail@skreutz.com>
Date: Sun, 7 Dec 2025 15:34:09 +0100
Subject: Use flake-parts instead of flake-utils

---
 flake.lock | 46 +++++++++++++++++++++++-----------------------
 flake.nix  | 52 ++++++++++++++++++++++++++++++++++++----------------
 2 files changed, 59 insertions(+), 39 deletions(-)

diff --git a/flake.lock b/flake.lock
index 36ea0c1..8ea085a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,20 +1,20 @@
 {
   "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": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
         "type": "github"
       },
       "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
         "type": "github"
       }
     },
@@ -34,26 +34,26 @@
         "type": "github"
       }
     },
-    "root": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
-      }
-    },
-    "systems": {
+    "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
         "type": "github"
       },
       "original": {
-        "owner": "nix-systems",
-        "repo": "default",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
         "type": "github"
       }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 43a2072..bdd81ea 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,22 +3,42 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
+    flake-parts.url = "github:hercules-ci/flake-parts";
   };
 
-  outputs = { self, nixpkgs, flake-utils, ... }@inputs:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-	pkgs = import nixpkgs {
-	  inherit system;
-	  config = { };
-	  overlays = [ ];
-	};
-    in {
-      # nix develop
-      devShells.default = pkgs.mkShell {
-	nativeBuildInputs = with pkgs; [ rustc cargo rustfmt clippy cargo-audit cargo-edit rust-analyzer ];
-      };
-    }
-  );
+  outputs =
+    inputs@{
+      self,
+      nixpkgs,
+      flake-parts,
+      ...
+    }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+
+      perSystem =
+        { pkgs, system, ... }:
+        {
+          # nix develop
+          devShells.default = pkgs.mkShell {
+            nativeBuildInputs = with pkgs; [
+              rustc
+              cargo
+              rustfmt
+              clippy
+              cargo-audit
+              cargo-edit
+              rust-analyzer
+            ];
+          };
+
+          # nix fmt
+          formatter = pkgs.nixfmt-tree;
+        };
+    };
 }
-- 
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