diff --git a/assets/default.nix b/assets/default.nix
index 123d12c..4e3187c 100644
--- a/assets/default.nix
+++ b/assets/default.nix
@@ -1,8 +1,8 @@
-{ lib, ... }:
+{ lib }:
 {
-  options.assets = lib.mkOption {
-    type = lib.types.unspecified;
-    readOnly = true;
+  options.assets = lib.options.create {
+    type = lib.types.raw;
+    writable = false;
   };
 
   config.assets = {
diff --git a/flake.lock b/flake.lock
index d40edeb..a07e474 100644
--- a/flake.lock
+++ b/flake.lock
@@ -276,26 +276,6 @@
       }
     },
     "flake-parts_2": {
-      "inputs": {
-        "nixpkgs-lib": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1741352980,
-        "narHash": "sha256-+u2UunDA4Cl5Fci3m7S643HzKmIDAe+fiXrLqYsR2fs=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "f4330d22f1c5d2ba72d3d22df5597d123fdb60a9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "type": "github"
-      }
-    },
-    "flake-parts_3": {
       "inputs": {
         "nixpkgs-lib": "nixpkgs-lib"
       },
@@ -509,7 +489,7 @@
     },
     "niko-nur": {
       "inputs": {
-        "flake-parts": "flake-parts_3",
+        "flake-parts": "flake-parts_2",
         "nixpkgs": "nixpkgs"
       },
       "locked": {
@@ -722,7 +702,6 @@
         "disko": "disko",
         "fenix": "fenix",
         "firefox-darwin": "firefox-darwin",
-        "flake-parts": "flake-parts_2",
         "helix": "helix",
         "home-manager": "home-manager",
         "lix": "lix",
diff --git a/flake.nix b/flake.nix
index 30729a5..bf7d117 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,73 +1,37 @@
 {
   outputs =
-    inputs@{ flake-parts, ... }:
+    inputs:
     let
       nilla = import ./nilla.nix { inherit inputs; };
-      transpose =
-        attrs:
-        let
-          inherit (inputs.nixpkgs) lib;
-          # maps an attrset of systems to packages to list of [ {name; system; value;} ]
-          pkgToListAll =
-            name: pkg:
-            map (system: {
-              inherit name system;
-              value = pkg.${system};
-            }) (builtins.attrNames pkg);
-          pkgsToListAll = pkgs: map (name: pkgToListAll name pkgs.${name}) (builtins.attrNames pkgs);
-          # list of all packages in format [ {name; system; value;} ]
-          allPkgs = lib.flatten (pkgsToListAll attrs);
-          systems = builtins.groupBy (pkg: pkg.system) allPkgs;
-        in
-        builtins.mapAttrs (_: pkgs: lib.listToAttrs pkgs) systems;
-    in
-    flake-parts.lib.mkFlake { inherit inputs; } {
       systems = [
         "x86_64-linux"
         "aarch64-linux"
         "aarch64-darwin"
       ];
-
-      imports = [
-        inputs.treefmt.flakeModule
-
-        ./assets
-        ./hosts
-        ./modules
-        ./services
-      ];
-
-      flake.devShells = transpose (builtins.mapAttrs (_: shell: shell.result) nilla.shells);
-      flake.packages = transpose (builtins.mapAttrs (_: pkg: pkg.result) nilla.packages);
-
-      perSystem = {
-        treefmt = {
-          programs.deadnix.enable = true;
-          programs.nixfmt.enable = true;
-          programs.statix.enable = true;
-          programs.fish_indent.enable = true;
-          programs.deno.enable = true;
-          programs.stylua.enable = true;
-          programs.shfmt.enable = true;
-          settings.global.excludes = [
-            # agenix
-            "*.age"
-
-            # racket
-            "*.rkt"
-            "**/rashrc"
-          ];
-          settings.on-unmatched = "fatal";
-        };
-      };
+      # NOTE: Assumes every package is available for every system.
+      #       For now let's say this is always the case.
+      transpose =
+        attrs:
+        let
+          inherit (inputs.nixpkgs) lib;
+          mappedForSystem = system: builtins.mapAttrs (_: pkg: pkg.result.${system}) attrs;
+        in
+        lib.genAttrs systems mappedForSystem;
+    in
+    {
+      inherit (nilla) nixosModules;
+      inherit (nilla) darwinModules;
+      inherit (nilla) homeModules;
+      inherit (nilla) nixosConfigurations;
+      inherit (nilla) darwinConfigurations;
+      inherit (nilla) homeConfigurations;
+      devShells = transpose nilla.shells;
+      packages = transpose nilla.packages;
+      formatter = nilla.packages.formatter.result;
     };
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixpkgs-unstable";
-    flake-parts = {
-      url = "github:hercules-ci/flake-parts";
-      inputs.nixpkgs-lib.follows = "nixpkgs";
-    };
     disko = {
       url = "github:nix-community/disko";
       inputs.nixpkgs.follows = "nixpkgs";
diff --git a/hosts/default.nix b/hosts/default.nix
index 03d464d..ac91988 100644
--- a/hosts/default.nix
+++ b/hosts/default.nix
@@ -1,11 +1,11 @@
 {
   config,
-  self,
-  inputs,
-  ...
 }:
+let
+  inputs = builtins.mapAttrs (_: input: input.result) config.inputs;
+in
 {
-  imports = [
+  includes = [
     ./kazuki
     ./hijiri-vm
     ./hijiri
@@ -17,20 +17,20 @@
     ./youko
   ];
 
-  builders =
+  config.configBuilders =
     let
       sharedOptions = {
         _file = ./default.nix;
 
         settei.sane-defaults.allSshKeys = config.assets.sshKeys.user;
         settei.flake-qol.inputs = inputs // {
-          settei = self;
+          settei = inputs.self;
         };
       };
 
       baseNixos = inputs.nixpkgs.lib.nixosSystem {
         modules = [
-          self.nixosModules.combined
+          config.nixosModules.combined
           sharedOptions
         ];
         specialArgs.configurationName = "base";
@@ -38,7 +38,7 @@
 
       baseDarwin = inputs.darwin.lib.darwinSystem {
         modules = [
-          self.darwinModules.combined
+          config.darwinModules.combined
           sharedOptions
         ];
         specialArgs.configurationName = "base";
@@ -50,7 +50,7 @@
         baseNixos.extendModules {
           modules = [
             module
-            config.__extraHostConfigs.${name} or { }
+            config.extraHostConfigs.${name} or { }
           ];
           specialArgs.configurationName = name;
         };
@@ -61,7 +61,7 @@
           eval = baseDarwin._module.args.extendModules {
             modules = [
               module
-              config.__extraHostConfigs.${name} or { }
+              config.extraHostConfigs.${name} or { }
             ];
             specialArgs.configurationName = name;
           };
diff --git a/hosts/hijiri-vm/default.nix b/hosts/hijiri-vm/default.nix
index db26c63..5f6d088 100644
--- a/hosts/hijiri-vm/default.nix
+++ b/hosts/hijiri-vm/default.nix
@@ -1,5 +1,5 @@
 {
-  configurations.nixos.hijiri-vm =
+  config.configurations.nixos.hijiri-vm =
     {
       modulesPath,
       lib,
diff --git a/hosts/hijiri/default.nix b/hosts/hijiri/default.nix
index bb7db92..a0e6857 100644
--- a/hosts/hijiri/default.nix
+++ b/hosts/hijiri/default.nix
@@ -1,5 +1,5 @@
 {
-  configurations.darwin.hijiri =
+  config.configurations.darwin.hijiri =
     {
       config,
       pkgs,
diff --git a/hosts/installer/default.nix b/hosts/installer/default.nix
index 24bdef8..a1692c6 100644
--- a/hosts/installer/default.nix
+++ b/hosts/installer/default.nix
@@ -1,6 +1,6 @@
 { lib, ... }:
 {
-  configurations.nixos =
+  config.configurations.nixos =
     let
       mkInstaller =
         system:
diff --git a/hosts/kazuki/default.nix b/hosts/kazuki/default.nix
index df92f1c..029d7d0 100644
--- a/hosts/kazuki/default.nix
+++ b/hosts/kazuki/default.nix
@@ -1,5 +1,5 @@
 {
-  configurations.nixos.kazuki =
+  config.configurations.nixos.kazuki =
     {
       modulesPath,
       ...
diff --git a/hosts/kogata/default.nix b/hosts/kogata/default.nix
index 6bf9e2f..3e7c21f 100644
--- a/hosts/kogata/default.nix
+++ b/hosts/kogata/default.nix
@@ -1,5 +1,5 @@
 {
-  configurations.darwin.kogata =
+  config.configurations.darwin.kogata =
     { pkgs, ... }:
     {
       nixpkgs.system = "aarch64-darwin";
diff --git a/hosts/legion/default.nix b/hosts/legion/default.nix
index 92c95be..1b41b1e 100644
--- a/hosts/legion/default.nix
+++ b/hosts/legion/default.nix
@@ -1,5 +1,5 @@
 {
-  configurations.nixos.legion =
+  config.configurations.nixos.legion =
     {
       config,
       username,
diff --git a/hosts/ude/default.nix b/hosts/ude/default.nix
index d395fbd..fd3e19b 100644
--- a/hosts/ude/default.nix
+++ b/hosts/ude/default.nix
@@ -1,5 +1,5 @@
 {
-  configurations.nixos.ude =
+  config.configurations.nixos.ude =
     {
       config,
       modulesPath,
diff --git a/hosts/youko/default.nix b/hosts/youko/default.nix
index 3a2fe49..b801507 100644
--- a/hosts/youko/default.nix
+++ b/hosts/youko/default.nix
@@ -1,5 +1,5 @@
 {
-  configurations.nixos.youko =
+  config.configurations.nixos.youko =
     {
       config,
       lib,
diff --git a/modules/default.nix b/modules/default.nix
index 32f8e5f..08dc44b 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -1,29 +1,21 @@
 {
   config,
-  inputs,
-  ...
 }:
 let
-  flakeModule = import ./flake { inherit (inputs) nixpkgs darwin home-manager; };
+  inputs = builtins.mapAttrs (_: input: input.result) config.inputs;
+  perInput = system: flake: {
+    packages = flake.packages.${system};
+  };
 in
 {
-  imports = [
-    flakeModule
-  ];
-
-  flake.homeModules = rec {
+  config.homeModules = rec {
     settei = ./home;
     default = settei;
   };
 
-  flake.flakeModules = rec {
-    settei = flakeModule;
-    default = settei;
-  };
-
-  flake.nixosModules = rec {
+  config.nixosModules = rec {
     settei = import ./system {
-      inherit (config) perInput;
+      inherit perInput;
       isLinux = true;
     };
     combined = {
@@ -46,9 +38,9 @@ in
     default = combined;
   };
 
-  flake.darwinModules = rec {
+  config.darwinModules = rec {
     settei = import ./system {
-      inherit (config) perInput;
+      inherit perInput;
       isLinux = false;
     };
     combined = {
diff --git a/modules/flake/configurations.nix b/modules/flake/configurations.nix
deleted file mode 100644
index 67ccc1b..0000000
--- a/modules/flake/configurations.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{
-  nixpkgs,
-  darwin,
-  home-manager,
-}:
-{
-  config,
-  lib,
-  ...
-}:
-with lib;
-{
-  _file = ./configurations.nix;
-
-  options = {
-    # Those functions take the final arguments and emit a valid configuration.
-    # Probably should hardly ever be overriden
-    builders = {
-      nixos = mkOption {
-        type = types.functionTo types.unspecified;
-        default = _name: nixpkgs.lib.nixosSystem;
-      };
-      darwin = mkOption {
-        type = types.functionTo types.unspecified;
-        default = _name: darwin.lib.darwinSystem;
-      };
-      home = mkOption {
-        type = types.functionTo types.unspecified;
-        default = _name: home-manager.lib.homeManagerConfiguration;
-      };
-    };
-
-    configurations = {
-      nixos = mkOption {
-        type = types.lazyAttrsOf types.deferredModule;
-        default = { };
-      };
-      darwin = mkOption {
-        type = types.lazyAttrsOf types.deferredModule;
-        default = { };
-      };
-      home = mkOption {
-        type = types.lazyAttrsOf types.deferredModule;
-        default = { };
-      };
-    };
-  };
-
-  config.flake = {
-    nixosConfigurations = mapAttrs config.builders.nixos config.configurations.nixos;
-    darwinConfigurations = mapAttrs config.builders.darwin config.configurations.darwin;
-    homeConfigurations = mapAttrs config.builders.home config.configurations.home;
-  };
-}
diff --git a/modules/flake/default.nix b/modules/flake/default.nix
deleted file mode 100644
index 78bb73d..0000000
--- a/modules/flake/default.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-  nixpkgs,
-  darwin,
-  home-manager,
-}:
-{
-  _file = ./default.nix;
-
-  imports = [
-    (import ./configurations.nix { inherit nixpkgs darwin home-manager; })
-    ./services.nix
-  ];
-}
diff --git a/modules/flake/services.nix b/modules/flake/services.nix
deleted file mode 100644
index f2f07d4..0000000
--- a/modules/flake/services.nix
+++ /dev/null
@@ -1,95 +0,0 @@
-# List of features I want this module to eventually have
-# TODO: Automatic port allocation
-# TODO: Making it possible to conveniently isolate services (running them in NixOS containers)
-# TODO: Handling specializations
-# TODO: Convenient http handling
-# TODO: Automatic backup
-{ config, lib, ... }:
-let
-  serviceModule =
-    { config, ... }:
-    {
-      options = {
-        host = lib.mkOption {
-          type = lib.types.str;
-        };
-        ports = lib.mkOption {
-          type = with lib.types; listOf port;
-          default = [ ];
-        };
-        hosts = lib.mkOption {
-          type = with lib.types; listOf str;
-          default = [ config.host ];
-        };
-        config = lib.mkOption {
-          type = lib.types.deferredModule;
-          default = { };
-        };
-        hostConfig = lib.mkOption {
-          type = with lib.types; attrsOf deferredModule;
-          default = { };
-        };
-      };
-    };
-
-  moduleToHostConfigs =
-    cfg:
-    lib.genAttrs cfg.hosts (host: {
-      imports = [
-        cfg.config
-        (cfg.hostConfig.${host} or { })
-      ];
-    });
-
-  maybeGetPreviousConfigs = acc: host: (acc.${host} or { imports = [ ]; }).imports;
-in
-{
-  _file = ./services.nix;
-
-  options = {
-    services = lib.mkOption {
-      type = with lib.types; attrsOf (submodule serviceModule);
-      default = { };
-    };
-
-    __extraHostConfigs = lib.mkOption {
-      type = with lib.types; attrsOf deferredModule;
-      readOnly = true;
-    };
-  };
-
-  config.__extraHostConfigs =
-    let
-      duplicatePorts = lib.pipe config.services [
-        lib.attrValues
-        (map (cfg: cfg.ports))
-        lib.flatten
-        (lib.groupBy' (cnt: _: cnt + 1) 0 toString)
-        (lib.filterAttrs (_: cnt: cnt > 1))
-        lib.attrNames
-      ];
-      assertMsg =
-        let
-          plural = lib.length duplicatePorts > 1;
-        in
-        "\nBad service config:\nThe following port${if plural then "s" else ""} ${
-          if plural then "were" else "was"
-        } declared multiple times: ${lib.concatStringsSep ", " duplicatePorts}";
-      # Here I collect all the services.<name>.config into a flat
-      # __extraHostConfigs.<host>.imports = [
-      #   ...
-      # ]
-      # so that I can easily import them in hosts/default.nix
-      hostConfigs = lib.pipe config.services [
-        lib.attrValues
-        (lib.foldl' (
-          acc: cfg:
-          acc
-          // lib.mapAttrs (host: c: {
-            imports = c.imports ++ (maybeGetPreviousConfigs acc host);
-          }) (moduleToHostConfigs cfg)
-        ) { })
-      ];
-    in
-    if duplicatePorts != [ ] then throw assertMsg else hostConfigs;
-}
diff --git a/modules/nilla/builders/custom-load.nix b/modules/nilla/builders/custom-load.nix
index b89bc36..b340dec 100644
--- a/modules/nilla/builders/custom-load.nix
+++ b/modules/nilla/builders/custom-load.nix
@@ -1,12 +1,7 @@
 { lib }:
 {
   config.builders.custom-load = {
-    settings.type = lib.types.submodule {
-      options.args = lib.options.create {
-        type = lib.types.null;
-        default.value = null;
-      };
-    };
+    settings.type = lib.types.submodule { };
     settings.default = { };
     build = pkg: lib.attrs.generate pkg.systems (system: pkg.package { inherit system; });
   };
diff --git a/modules/nilla/configurations.nix b/modules/nilla/configurations.nix
new file mode 100644
index 0000000..6f02f7e
--- /dev/null
+++ b/modules/nilla/configurations.nix
@@ -0,0 +1,47 @@
+{ config, lib }:
+{
+  options = {
+    configBuilders = {
+      nixos = lib.options.create {
+        type = lib.types.function lib.types.raw;
+        default.value = _name: config.inputs.nixpkgs.result.lib.nixosSystem;
+      };
+      darwin = lib.options.create {
+        type = lib.types.function lib.types.raw;
+        default.value = _name: config.inputs.darwin.result.lib.darwinSystem;
+      };
+      home = lib.options.create {
+        type = lib.types.function lib.types.raw;
+        default.value = _name: config.inputs.home-manager.result.lib.homeManagerConfiguration;
+      };
+    };
+
+    configurations = {
+      nixos = lib.options.create {
+        type = lib.types.attrs.lazy lib.types.raw;
+        default.value = { };
+      };
+      darwin = lib.options.create {
+        type = lib.types.attrs.lazy lib.types.raw;
+        default.value = { };
+      };
+      home = lib.options.create {
+        type = lib.types.attrs.lazy lib.types.raw;
+        default.value = { };
+      };
+    };
+
+    nixosConfigurations = lib.options.create {
+      type = lib.types.attrs.lazy lib.types.raw;
+      default.value = builtins.mapAttrs config.configBuilders.nixos config.configurations.nixos;
+    };
+    darwinConfigurations = lib.options.create {
+      type = lib.types.attrs.lazy lib.types.raw;
+      default.value = builtins.mapAttrs config.configBuilders.darwin config.configurations.darwin;
+    };
+    homeConfigurations = lib.options.create {
+      type = lib.types.attrs.lazy lib.types.raw;
+      default.value = builtins.mapAttrs config.configBuilders.home config.configurations.home;
+    };
+  };
+}
diff --git a/modules/nilla/default.nix b/modules/nilla/default.nix
index f9e4319..bfcd452 100644
--- a/modules/nilla/default.nix
+++ b/modules/nilla/default.nix
@@ -1,3 +1,8 @@
 {
-  includes = [ ./builders ];
+  includes = [
+    ./builders
+    ./services.nix
+    ./configurations.nix
+    ./modules.nix
+  ];
 }
diff --git a/modules/nilla/modules.nix b/modules/nilla/modules.nix
new file mode 100644
index 0000000..7b8a6dc
--- /dev/null
+++ b/modules/nilla/modules.nix
@@ -0,0 +1,17 @@
+{ lib }:
+{
+  options = {
+    nixosModules = lib.options.create {
+      type = lib.types.attrs.of lib.types.raw;
+      default.value = { };
+    };
+    darwinModules = lib.options.create {
+      type = lib.types.attrs.of lib.types.raw;
+      default.value = { };
+    };
+    homeModules = lib.options.create {
+      type = lib.types.attrs.of lib.types.raw;
+      default.value = { };
+    };
+  };
+}
diff --git a/modules/nilla/services.nix b/modules/nilla/services.nix
new file mode 100644
index 0000000..1045a4a
--- /dev/null
+++ b/modules/nilla/services.nix
@@ -0,0 +1,95 @@
+{ lib, config }:
+let
+  inherit (builtins)
+    attrNames
+    attrValues
+    concatStringsSep
+    mapAttrs
+    foldl'
+    groupBy
+    length
+    ;
+  serviceModule =
+    { config }:
+    {
+      options = {
+        host = lib.options.create {
+          type = lib.types.string;
+        };
+        ports = lib.options.create {
+          type = lib.types.list.of lib.types.port;
+          default.value = [ ];
+        };
+        hosts = lib.options.create {
+          type = lib.types.list.of lib.types.string;
+          default.value = [ config.host ];
+        };
+        module = lib.options.create {
+          type = lib.types.raw;
+          default.value = { };
+        };
+        hostModule = lib.options.create {
+          type = lib.types.attrs.of lib.types.raw;
+          default.value = { };
+        };
+      };
+    };
+
+  moduleToHostConfigs =
+    cfg:
+    lib.attrs.generate cfg.hosts (host: {
+      imports = [
+        cfg.module
+        (cfg.hostModule.${host} or { })
+      ];
+    });
+
+  maybeGetPreviousConfigs = acc: host: (acc.${host} or { imports = [ ]; }).imports;
+
+  # Copied from nixpkgs/lib/lists.nix
+  groupBy' =
+    op: nul: pred: lst:
+    mapAttrs (_name: foldl' op nul) (groupBy pred lst);
+  duplicatePorts = lib.fp.pipe [
+    attrValues
+    (map (cfg: cfg.ports))
+    lib.lists.flatten
+    (groupBy' (cnt: _: cnt + 1) 0 toString)
+    (lib.attrs.filter (_: cnt: cnt > 1))
+    attrNames
+  ] config.services;
+in
+{
+  options.services = lib.options.create {
+    type = lib.types.attrs.of (lib.types.submodule serviceModule);
+    default.value = { };
+  };
+
+  options.extraHostConfigs = lib.options.create {
+    type = lib.types.attrs.of lib.types.raw;
+    writable = false;
+    default.value = lib.fp.pipe [
+      attrValues
+      (foldl' (
+        acc: cfg:
+        acc
+        // mapAttrs (host: c: {
+          imports = c.imports ++ (maybeGetPreviousConfigs acc host);
+        }) (moduleToHostConfigs cfg)
+      ) { })
+    ] config.services;
+  };
+
+  config.assertions = [
+    {
+      assertion = duplicatePorts == [ ];
+      message =
+        let
+          plural = length duplicatePorts > 1;
+        in
+        "\nBad service config:\nThe following port${if plural then "s" else ""} ${
+          if plural then "were" else "was"
+        } declared multiple times: ${concatStringsSep ", " duplicatePorts}";
+    }
+  ];
+}
diff --git a/nilla.nix b/nilla.nix
index 302900a..bc20103 100644
--- a/nilla.nix
+++ b/nilla.nix
@@ -8,6 +8,10 @@
       ./modules/nilla
       ./pkgs
       ./wrappers
+      ./hosts
+      ./assets
+      ./services
+      ./modules
     ];
 
     config.inputs = builtins.mapAttrs (_: src: {
@@ -55,13 +59,23 @@
             name = "settei-base";
             paths = with (getPkgs system); [
               # TODO: wrappers
-              # helix
-              # fish
+              helix
+              fish
               git-commit-last
               git-fixup
             ];
           }
         );
+        formatter = {
+          inherit systems;
+          builder = "custom-load";
+          package =
+            { system }:
+            let
+              eval = inputs.treefmt.lib.evalModule inputs.nixpkgs.legacyPackages.${system} ./treefmt.nix;
+            in
+            eval.config.build.wrapper;
+        };
       };
 
     config.shells.default = {
diff --git a/services/attic.nix b/services/attic.nix
index 91d675f..f9d7501 100644
--- a/services/attic.nix
+++ b/services/attic.nix
@@ -1,12 +1,12 @@
 {
-  services.attic =
+  config.services.attic =
     let
       atticPort = 9476;
     in
     {
       host = "kazuki";
       ports = [ atticPort ];
-      config =
+      module =
         { config, ... }:
         {
           age.secrets.attic-creds = {
diff --git a/services/default.nix b/services/default.nix
index 1837462..c87f779 100644
--- a/services/default.nix
+++ b/services/default.nix
@@ -1,5 +1,5 @@
 {
-  imports = [
+  includes = [
     ./attic.nix
     ./forgejo-runner.nix
   ];
diff --git a/services/forgejo-runner.nix b/services/forgejo-runner.nix
index 693d1d1..98574a1 100644
--- a/services/forgejo-runner.nix
+++ b/services/forgejo-runner.nix
@@ -1,10 +1,10 @@
 {
-  services.forgejo-runner = {
+  config.services.forgejo-runner = {
     hosts = [
       "ude"
       "youko"
     ];
-    config =
+    module =
       {
         config,
         lib,
diff --git a/treefmt.nix b/treefmt.nix
new file mode 100644
index 0000000..e033626
--- /dev/null
+++ b/treefmt.nix
@@ -0,0 +1,19 @@
+{
+  projectRootFile = "nilla.nix";
+  programs.deadnix.enable = true;
+  programs.nixfmt.enable = true;
+  programs.statix.enable = true;
+  programs.fish_indent.enable = true;
+  programs.deno.enable = true;
+  programs.stylua.enable = true;
+  programs.shfmt.enable = true;
+  settings.global.excludes = [
+    # agenix
+    "*.age"
+
+    # racket
+    "*.rkt"
+    "**/rashrc"
+  ];
+  settings.on-unmatched = "fatal";
+}