Format with nixfmt

Change-Id: If9839d2c3308538ac8f3e166b69675d3b40bd7d9
diff --git a/default/flake.nix b/default/flake.nix
index ddbaf5f..a379628 100644
--- a/default/flake.nix
+++ b/default/flake.nix
@@ -6,10 +6,8 @@
     packages.x86_64-linux.hello = nixpkgs.legacyPackages.x86_64-linux.hello;
 
     packages.x86_64-linux.nixosConfigurations.nixos =
-      let
-        pkgs = nixpkgs.legacyPackages.x86_64-linux;
-      in
-      nixpkgs.lib.nixosSystem {
+      let pkgs = nixpkgs.legacyPackages.x86_64-linux;
+      in nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
           {