From fc669d5534cc862e8cfc16a4ba391cb9595f9411 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jalil=20David=20Salam=C3=A9=20Messina?=
 <jalil.salame@gmail.com>
Date: Tue, 29 Apr 2025 08:08:00 +0200
Subject: [PATCH] fix(treefmt): respect the packages edition

Otherwise it might upgrade to edition 2024 which is not available in
stable.
---
 flake-modules/default.nix | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/flake-modules/default.nix b/flake-modules/default.nix
index 6736a16..7cf532e 100644
--- a/flake-modules/default.nix
+++ b/flake-modules/default.nix
@@ -1,4 +1,8 @@
-{ inputs, ... }:
+{ lib, inputs, ... }:
+let
+  webnsupdate = ../module.nix;
+  cargoToml = lib.importTOML ../Cargo.toml;
+in
 {
   imports = [
     inputs.treefmt-nix.flakeModule
@@ -6,14 +10,10 @@
     ./tests.nix
   ];
 
-  flake.nixosModules =
-    let
-      webnsupdate = ../module.nix;
-    in
-    {
-      default = webnsupdate;
-      inherit webnsupdate;
-    };
+  flake.nixosModules = {
+    default = webnsupdate;
+    inherit webnsupdate;
+  };
 
   perSystem =
     { pkgs, ... }:
@@ -23,7 +23,10 @@
         projectRootFile = "flake.nix";
         programs = {
           nixfmt.enable = true;
-          rustfmt.enable = true;
+          rustfmt = {
+            enable = true;
+            inherit (cargoToml.package) edition; # respect the package's edition
+          };
           statix.enable = true;
           typos.enable = true;
         };