Format project using nixfmt rfc candidate.

config/nix.nix

@@ -6,10 +6,12 @@
   config,
   lib,
   ...
-}: let
+}:
+let
   cfg = config.machine;
   emptyGlobalRegistry = pkgs.writeText "registry.json" ''{ "flakes": [], "version": 2 }'';
-in {
+in
+{
   nix = {
     package = pkgs.nix;
     registry = {
@@ -22,19 +24,15 @@ in {
       cores = 1;
       sandbox = true;
       auto-optimise-store = true;
-      trusted-substituters =
-        [
-          "https://cache.nixos.org"
-        ]
-        ++ cfg.binaryCaches;
+      trusted-substituters = [
+        "https://cache.nixos.org"
+      ] ++ cfg.binaryCaches;
       # TODO: integrate into sops
       # trusted-public-keys = [ (lib.fileContents "${cfg.secretPath}/hydra_cache.pub") ];
-      substituters =
-        [
-          "https://cache.nixos.org"
-        ]
-        ++ cfg.binaryCaches;
-      allowed-users = ["root"] ++ (map (n: n.name) cfg.administrators);
+      substituters = [
+        "https://cache.nixos.org"
+      ] ++ cfg.binaryCaches;
+      allowed-users = [ "root" ] ++ (map (n: n.name) cfg.administrators);
     };
     extraOptions = ''
       build-timeout = 86400  # 24 hours