diff --git a/assets/pkg/nix/get-cfg-file.nix b/assets/pkg/nix/get-cfg-file.nix
index a1e3de0..095f589 100644
--- a/assets/pkg/nix/get-cfg-file.nix
+++ b/assets/pkg/nix/get-cfg-file.nix
@@ -1,13 +1,20 @@
-{ cfg, src, lib, ... }:
+{
+  cfg,
+  src,
+  lib,
+  ...
+}:
 let
-    maker = import ./make-cfg.nix {
-        inherit lib;
-        keys-h-file = builtins.readFile "${src}/include/keys.h";
-    };
-in builtins.toFile "lidm.conf" (
-    if builtins.isString cfg
-        then builtins.readFile "${src}/themes/${cfg}.ini"
-    else if builtins.isAttrs cfg
-        then maker.make cfg
-    else builtins.throw "invalid cfg type, expected str or attrs"
+  maker = import ./make-cfg.nix {
+    inherit lib;
+    keys-h-file = builtins.readFile "${src}/include/keys.h";
+  };
+in
+builtins.toFile "lidm.conf" (
+  if builtins.isString cfg then
+    builtins.readFile "${src}/themes/${cfg}.ini"
+  else if builtins.isAttrs cfg then
+    maker.make cfg
+  else
+    builtins.throw "invalid cfg type, expected str or attrs"
 )
diff --git a/assets/pkg/nix/lidm.nix b/assets/pkg/nix/lidm.nix
index cbe77b4..37006b7 100644
--- a/assets/pkg/nix/lidm.nix
+++ b/assets/pkg/nix/lidm.nix
@@ -1,35 +1,44 @@
-{ config, pkgs, lib, ...}:
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
 let
-    cfg-file = if config.cfg != null then
-        import ./get-cfg-file.nix {
-            inherit lib;
-            inherit (config) cfg src;
-        }
-    else null;
+  cfg-file =
+    if config.cfg != null then
+      import ./get-cfg-file.nix {
+        inherit lib;
+        inherit (config) cfg src;
+      }
+    else
+      null;
 in
 pkgs.stdenv.mkDerivation rec {
-    pname = "lidm";
-    version = config.version;
-    src = config.src;
+  pname = "lidm";
+  version = config.version;
+  src = config.src;
 
-    nativeBuildInputs = with pkgs; [
-        gcc
-        gnumake
-        linux-pam
-    ];
+  nativeBuildInputs = with pkgs; [
+    gcc
+    gnumake
+    linux-pam
+  ];
 
-    makeFlags = [
-        "DESTDIR=$(out)"
-        "PREFIX="
+  makeFlags =
+    [
+      "DESTDIR=$(out)"
+      "PREFIX="
     ]
-    ++ lib.optional (config.xsessions != null)
-        "CPPFLAGS+=-DSESSIONS_XSESSIONS=\\\"${config.xsessions}\\\""
-    ++ lib.optional (config.wayland-sessions != null)
-        "CPPFLAGS+=-DSESSIONS_WAYLAND=\\\"${config.wayland-sessions}\\\""
-    ++ lib.optional (cfg-file != null)
-        "CPPFLAGS+=-DLIDM_CONF_PATH=\\\"${cfg-file}\\\"";
+    ++ lib.optional (
+      config.xsessions != null
+    ) "CPPFLAGS+=-DSESSIONS_XSESSIONS=\\\"${config.xsessions}\\\""
+    ++ lib.optional (
+      config.wayland-sessions != null
+    ) "CPPFLAGS+=-DSESSIONS_WAYLAND=\\\"${config.wayland-sessions}\\\""
+    ++ lib.optional (cfg-file != null) "CPPFLAGS+=-DLIDM_CONF_PATH=\\\"${cfg-file}\\\"";
 
-    fixupPhase = ''
-        rm -rf $out/etc
-    '';
+  fixupPhase = ''
+    rm -rf $out/etc
+  '';
 }
diff --git a/assets/pkg/nix/make-cfg.nix b/assets/pkg/nix/make-cfg.nix
index 659e9f3..8114c71 100644
--- a/assets/pkg/nix/make-cfg.nix
+++ b/assets/pkg/nix/make-cfg.nix
@@ -1,70 +1,73 @@
 { lib, keys-h-file }:
 
 let
-    double-match-to-nameval = dmatch: { name = builtins.elemAt dmatch 0; value = builtins.elemAt dmatch 1; };
+  double-match-to-nameval = dmatch: {
+    name = builtins.elemAt dmatch 0;
+    value = builtins.elemAt dmatch 1;
+  };
 
-    keys-enum = let
-        key-names = builtins.replaceStrings ["\n" " "] ["" ""] (
-            builtins.elemAt (
-                builtins.match
-                    ".*KEY_NAMES\\[][[:blank:]]*=[[:blank:]]*\\{([^}]*)}.*"
-                    keys-h-file
-            ) 0
-        );
+  keys-enum =
+    let
+      key-names = builtins.replaceStrings [ "\n" " " ] [ "" "" ] (
+        builtins.elemAt (builtins.match ".*KEY_NAMES\\[][[:blank:]]*=[[:blank:]]*\\{([^}]*)}.*" keys-h-file) 0
+      );
 
-        keys-2d-list = builtins.map
-            (builtins.match "\\[(.*)]=\"(.*)\"")
-            (builtins.filter
-                (s: builtins.isString s && s != "")
-                (builtins.split "," key-names)
-            );
+      keys-2d-list = builtins.map (builtins.match "\\[(.*)]=\"(.*)\"") (
+        builtins.filter (s: builtins.isString s && s != "") (builtins.split "," key-names)
+      );
 
-    in builtins.listToAttrs (
-        builtins.map
-            (k: k // { value = { __enum_key = k.value; }; })
-            (builtins.map double-match-to-nameval keys-2d-list)
+    in
+    builtins.listToAttrs (
+      builtins.map (
+        k:
+        k
+        // {
+          value = {
+            __enum_key = k.value;
+          };
+        }
+      ) (builtins.map double-match-to-nameval keys-2d-list)
     );
-in {
-    inherit keys-enum;
-    make = let
-        name-val-to-attrs = (name: value: { inherit name value; } );
-        map-attrs = attrset: fn: lib.map fn
-            (lib.attrsets.mapAttrsToList name-val-to-attrs attrset);
+in
+{
+  inherit keys-enum;
+  make =
+    let
+      name-val-to-attrs = (name: value: { inherit name value; });
+      map-attrs = attrset: fn: lib.map fn (lib.attrsets.mapAttrsToList name-val-to-attrs attrset);
 
-        try-foldl' = op: nul: list:
-            if (builtins.length list) == 0 then ""
-            else builtins.foldl' op nul list;
-        concat-with = sepr: list: try-foldl'
-            (x: y: if x == null then y else x + sepr + y)
-            null
-            list;
+      try-foldl' =
+        op: nul: list:
+        if (builtins.length list) == 0 then "" else builtins.foldl' op nul list;
+      concat-with = sepr: list: try-foldl' (x: y: if x == null then y else x + sepr + y) null list;
 
-        ser-bool = bool: if bool then "true" else "false";
-        ser-str = str: "\"${builtins.replaceStrings ["\n" "\""] ["\\n" "\\\""] str}\"";
-        ser-kvs = { name, value }: if builtins.isList value then
-            concat-with "\n" (
-                builtins.map
-                    (value: ser-kvs { inherit name value; })
-                    value
-            )
-        else "${name} = ${
+      ser-bool = bool: if bool then "true" else "false";
+      ser-str = str: "\"${builtins.replaceStrings [ "\n" "\"" ] [ "\\n" "\\\"" ] str}\"";
+      ser-kvs =
+        { name, value }:
+        if builtins.isList value then
+          concat-with "\n" (builtins.map (value: ser-kvs { inherit name value; }) value)
+        else
+          "${name} = ${
             if builtins.isString value then
-                ser-str value
+              ser-str value
             else if builtins.isInt value then
-                builtins.toString value
+              builtins.toString value
             else if builtins.isBool value then
-                ser-bool value
+              ser-bool value
             else if builtins.isAttrs value then
-                value.__enum_key
-            else builtins.throw "type not supported"
-        }";
+              value.__enum_key
+            else
+              builtins.throw "type not supported"
+          }";
 
-        ser-table = table': let
-            tname = table'.name;
-            table = table'.value;
+      ser-table =
+        table':
+        let
+          tname = table'.name;
+          table = table'.value;
         in
-        "[${tname}]\n" + (
-            concat-with "\n" (map-attrs table ser-kvs)
-        );
-    in cfg: concat-with "\n\n" (map-attrs cfg ser-table);
+        "[${tname}]\n" + (concat-with "\n" (map-attrs table ser-kvs));
+    in
+    cfg: concat-with "\n\n" (map-attrs cfg ser-table);
 }
diff --git a/assets/pkg/nix/module.nix b/assets/pkg/nix/module.nix
index 4e168b0..9a6bbc0 100644
--- a/assets/pkg/nix/module.nix
+++ b/assets/pkg/nix/module.nix
@@ -1,55 +1,65 @@
-{ config, lib, pkgs, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 
 let
-    cfg = config.services.lidm;
+  cfg = config.services.lidm;
 
-    dmcfg = config.services.displayManager;
-    desktops = dmcfg.sessionData.desktops;
+  dmcfg = config.services.displayManager;
+  desktops = dmcfg.sessionData.desktops;
 
-    version = "1.2.1";
-    lidmPkg = pkgs.callPackage ./lidm.nix {
-        inherit pkgs;
-        config = {
-            inherit version lib;
-            cfg = cfg.config;
-            src = pkgs.fetchFromGitHub {
-              owner = "javalsai";
-              repo = "lidm";
-              rev = "v${version}";
-              sha256 = "sha256-3CgUI8PUs4c1bfBrykPw87SSa4lzrh4E4Hug7cGRKFk=";
-            };
+  version = "1.2.1";
+  lidmPkg = pkgs.callPackage ./lidm.nix {
+    inherit pkgs;
+    config = {
+      inherit version lib;
+      cfg = cfg.config;
+      src = pkgs.fetchFromGitHub {
+        owner = "javalsai";
+        repo = "lidm";
+        rev = "v${version}";
+        sha256 = "sha256-3CgUI8PUs4c1bfBrykPw87SSa4lzrh4E4Hug7cGRKFk=";
+      };
 
-            xsessions = "${desktops}/share/xsessions";
-            wayland-sessions = "${desktops}/share/wayland-sessions";
-        };
+      xsessions = "${desktops}/share/xsessions";
+      wayland-sessions = "${desktops}/share/wayland-sessions";
     };
+  };
 in
 {
-    options.services.lidm.config = lib.mkOption {
-        type = with lib.types; oneOf [ str attrs ];
-        default = {};
-        description = "Config options for lidm | Either attr tree or name of bundled themes";
-    };
-    config = {
-        services.displayManager.defaultSession = "lidm";
+  options.services.lidm.config = lib.mkOption {
+    type =
+      with lib.types;
+      oneOf [
+        str
+        attrs
+      ];
+    default = { };
+    description = "Config options for lidm | Either attr tree or name of bundled themes";
+  };
+  config = {
+    services.displayManager.defaultSession = "lidm";
 
-        systemd.services.lidm = {
-            description = "TUI display manager";
-            aliases = [ "display-manager.service" ];
-            after = [
-                "systemd-user-sessions.service"
-                "plymouth-quit-wait.service"
-            ];
-            serviceConfig = {
-                Type = "idle";
-                ExecStart = "${lidmPkg}/bin/lidm 7";
-                StandardInput = "tty";
-                StandardOutput = "tty";
-                StandardError = "tty";
-                TTYPath = "/dev/tty7";
-                TTYReset = "yes";
-                TTYVHangup = "yes";
-            };
-        };
+    systemd.services.lidm = {
+      description = "TUI display manager";
+      aliases = [ "display-manager.service" ];
+      after = [
+        "systemd-user-sessions.service"
+        "plymouth-quit-wait.service"
+      ];
+      serviceConfig = {
+        Type = "idle";
+        ExecStart = "${lidmPkg}/bin/lidm 7";
+        StandardInput = "tty";
+        StandardOutput = "tty";
+        StandardError = "tty";
+        TTYPath = "/dev/tty7";
+        TTYReset = "yes";
+        TTYVHangup = "yes";
+      };
     };
+  };
 }
diff --git a/flake.lock b/flake.lock
index 5e1e2f1..69ad071 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,11 +5,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1710146030,
-        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1724224976,
-        "narHash": "sha256-Z/ELQhrSd7bMzTO8r7NZgi9g5emh+aRKoCdaAv5fiO0=",
+        "lastModified": 1751637120,
+        "narHash": "sha256-xVNy/XopSfIG9c46nRmPaKfH1Gn/56vQ8++xWA8itO4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c374d94f1536013ca8e92341b540eba4c22f9c62",
+        "rev": "5c724ed1388e53cc231ed98330a60eb2f7be4be3",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 1633d14..2d9a490 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,16 +7,18 @@
   };
 
   outputs =
-    { flake-utils, nixpkgs, ... }:
+    {
+      flake-utils,
+      nixpkgs,
+      self,
+    }:
     flake-utils.lib.eachDefaultSystem (
       system:
       let
         pkgs = import nixpkgs { inherit system; };
 
         name = "lidm";
-        version = builtins.elemAt (
-          builtins.match "VERSION[[:blank:]]*=[[:space:]]*([^\n]*)\n.*" (builtins.readFile ./Makefile)
-        ) 0;
+        version = builtins.elemAt (builtins.match "VERSION[[:blank:]]*=[[:space:]]*([^\n]*)\n.*" (builtins.readFile ./Makefile)) 0;
 
         lidm = pkgs.callPackage assets/pkg/nix/lidm.nix {
           inherit pkgs;
@@ -35,8 +37,10 @@
         defaultApp = flake-utils.lib.mkApp { drv = defaultPackage; };
         defaultPackage = lidm;
         devShell = pkgs.mkShell { buildInputs = lidm.nativeBuildInputs ++ [ pkgs.clang-tools ]; };
+        formatter = nixpkgs.legacyPackages.${system}.nixfmt-tree;
       }
-    ) // {
+    )
+    // {
       nixosModules.lidm = assets/pkg/nix/module.nix;
     };
 }