fix: Formatting

Working:
  - The daemon
  - Mutable config — well, kinda. I'm not yet sure how it will interact with
    `emacsWithPackagesFromUsePackage`.
  - Packages via Nixpkgs

outputs/homeConfigurations.nix

@@ -13,6 +13,7 @@ let users = builtins.readDir ../users;
         # Directory name should always match username.
         ({ ... }: { home.username = username; })
 
+        # TODO: Move to default module.
         ({ lib, ... }: {
           nix = {
             settings.experimental-features =

outputs/nixosConfigurations.nix

@@ -18,42 +18,44 @@ let
           (builtins.readDir ../users)));
   };
 
-  mkHost = hostName: nixpkgs.lib.nixosSystem {
+  mkHost = hostName:
-    specialArgs = inputs;
+    let system = import ../hosts/${hostName}/system.nix;
-    system = import ../hosts/${hostName}/system.nix;
+    in nixpkgs.lib.nixosSystem {
-    # TODO: This is very ad-hoc, and I don't like it.  Organise this better.
+      specialArgs = inputs;
-    modules = [
+      inherit system;
-      ../hosts/${hostName}/configuration.nix
+      modules = [
+        ../hosts/${hostName}/configuration.nix
 
-      inputs.self.nixosModules.default
+        inputs.self.nixosModules.default
 
-      inputs.disko.nixosModules.disko
+        inputs.disko.nixosModules.disko
-      inputs.sops-nix.nixosModules.sops
+        inputs.sops-nix.nixosModules.sops
-      inputs.impermanence.nixosModules.impermanence
+        inputs.impermanence.nixosModules.impermanence
 
-      # Directory name should always match host name.
+        # Directory name should always match host name.
-      ({ ... }: { networking.hostName = hostName; })
+        ({ ... }: { networking.hostName = hostName; })
 
-      (mkHostUsers hostName)
+        (mkHostUsers hostName)
 
-      # home-manager configuration.
+        # home-manager configuration.
-      inputs.home-manager.nixosModules.home-manager
+        inputs.home-manager.nixosModules.home-manager
-      ({ config, lib, self, ... }: {
+        ({ config, lib, self, ... }: {
-        home-manager.useGlobalPkgs = true;
+          home-manager.useGlobalPkgs = true;
 
-        home-manager.users =
+          home-manager.users =
-          lib.filterAttrs
+            lib.filterAttrs
-            (username: _: builtins.elem username config.sydnix.users.users)
+              (username: _: builtins.elem username config.sydnix.users.users)
-            self.homeConfigurations;
+              self.homeConfigurations;
 
-        home-manager.extraSpecialArgs = {
+          home-manager.extraSpecialArgs = {
-          utils = import ../lib/utils.nix {
+            utils = import ../lib/utils.nix {
-            inherit config lib;
+              inherit config lib;
-            pkgs = nixpkgs;
+              pkgs = nixpkgs;
+            };
+            inherit inputs system;
           };
-        };
+        })
-      })
+      ];
-    ];
+    };
-  };
 in
 builtins.mapAttrs (dirName: _: mkHost dirName) (builtins.readDir ../hosts)