feat: format via 'ls **/*.nix | each { |it| nixfmt $it.name }'

modules/base/nix.nix

@@ -3,7 +3,8 @@
   config,
   myvars,
   ...
-}: {
+}:
+{
   # auto upgrade nix to the unstable version
   # https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/tools/package-management/nix/default.nix#L284
   # nix.package = pkgs.nixVersions.latest;
@@ -13,12 +14,15 @@
 
   nix.settings = {
     # enable flakes globally
-    experimental-features = ["nix-command" "flakes"];
+    experimental-features = [
+      "nix-command"
+      "flakes"
+    ];
 
     # given the users in this list the right to specify additional substituters via:
     #    1. `nixConfig.substituers` in `flake.nix`
     #    2. command line args `--options substituers http://xxx`
-    trusted-users = [myvars.username];
+    trusted-users = [ myvars.username ];
 
     # substituers that will be considered before the official ones(https://cache.nixos.org)
     substituters = [