use nixfmt

flake.nix

@@ -1,18 +1,20 @@
 {
   description = "C's Nix-Config";
 
-  outputs = {
+  outputs =
+    {
       self,
       nixpkgs,
       flake-parts,
       ...
-  } @ inputs: let
+    }@inputs:
+    let
       cLib = import ./lib { inherit (nixpkgs) lib; };
-    mkLinuxSystem = mod: ovl:
+      mkLinuxSystem =
+        mod: ovl:
         nixpkgs.lib.nixosSystem {
           specialArgs = { inherit inputs cLib; };
-        modules =
-          [
+          modules = [
             inputs.home-manager.nixosModules.home-manager
             inputs.stylix.nixosModules.stylix
             inputs.agenix.nixosModules.default
@@ -57,17 +59,17 @@
         };
       };
 
-      perSystem = {
+      perSystem =
+        {
           config,
           pkgs,
           final,
           inputs',
           ...
-      }: {
+        }:
+        {
           _module.args.pkgs = inputs'.nixpkgs.legacyPackages.extend self.overlays.default;
-        overlayAttrs =
-          config.packages
-          // {
+          overlayAttrs = config.packages // {
             unstable = inputs'.unstable.legacyPackages;
             scenics = inputs'.scenics.packages;
           };
@@ -80,7 +82,7 @@
 
           treefmt.config = {
             projectRootFile = "flake.nix";
-          programs.alejandra.enable = true;
+            programs.nixfmt.enable = true;
             programs.deadnix.enable = true;
           };