change formatter to nixfmt-tree, reformat

flake.nix

@@ -85,6 +85,19 @@
         "ronja-pc"
       ];
       forDevice = f: nixpkgs.lib.mapAttrs f devices;
+      supported-systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+      forAllSystems =
+        f:
+        nixpkgs.lib.genAttrs supported-systems (
+          system:
+          f rec {
+            inherit system;
+            pkgs = nixpkgs.legacyPackages.${system};
+          }
+        );
     in
     rec {
       nixosConfigurations = forDevice (
@@ -148,9 +161,6 @@
         };
       };
 
-      formatter = {
+      formatter = forAllSystems ({ pkgs, ... }: pkgs.nixfmt-tree);
-        x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-rfc-style;
-        aarch64-linux = nixpkgs.legacyPackages.aarch64-linux.nixfmt-rfc-style;
-      };
     };
 }

home/vinzenz/gnome.nix

@@ -1,13 +1,16 @@
 { pkgs, ... }:
 {
   config = {
-    home.packages = with pkgs.gnomeExtensions; [
+    home.packages =
+      with pkgs.gnomeExtensions;
+      [
         gsconnect
         # battery-health-charging
         quick-settings-tweaker
         solaar-extension
         alphabetical-app-grid
-    ] ++ (with pkgs; [foliate]);
+      ]
+      ++ (with pkgs; [ foliate ]);
 
     dconf.settings = {
       "org/gnome/shell" = {

hosts/vinzenz-lpt2/configuration.nix

@@ -37,6 +37,9 @@
       };
     };
 
-    networking.firewall.allowedTCPPorts = [ 8776 1337 ];
+    networking.firewall.allowedTCPPorts = [
+      8776
+      1337
+    ];
   };
 }