diff --git a/flake.lock b/flake.lock
index b3d9340..2593d20 100644
--- a/flake.lock
+++ b/flake.lock
@@ -28,11 +28,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1756047880,
-        "narHash": "sha256-JeuGh9kA1SPL70fnvpLxkIkCWpTjtoPaus3jzvdna0k=",
+        "lastModified": 1763982521,
+        "narHash": "sha256-ur4QIAHwgFc0vXiaxn5No/FuZicxBr2p0gmT54xZkUQ=",
         "owner": "tweag",
         "repo": "gomod2nix",
-        "rev": "47d628dc3b506bd28632e47280c6b89d3496909d",
+        "rev": "02e63a239d6eabd595db56852535992c898eba72",
         "type": "github"
       },
       "original": {
@@ -43,11 +43,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1756823642,
-        "narHash": "sha256-5n3gG2zESe1xNeoccFe8sHtBNneShfCt+NqWsn6KpR4=",
+        "lastModified": 1766601203,
+        "narHash": "sha256-iCAUuJRNgRoxlcBfH6pFZLU0TDzfBczpliP5iLJYujk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "549bb173b0aea5dc66da4d9443710e08f9cb5556",
+        "rev": "c0532e48685132432f0d6fa751cc2bda0381b8dd",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 625da36..225d09c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,85 +1,117 @@
 {
   description = "sanic - chaos music control";
   inputs = {
-    nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable-small;
-    flake-utils.url = github:numtide/flake-utils;
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small";
+    flake-utils.url = "github:numtide/flake-utils";
     gomod2nix = {
-      url = github:tweag/gomod2nix;
+      url = "github:tweag/gomod2nix";
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.flake-utils.follows = "flake-utils";
     };
   };
-  outputs = { self, nixpkgs, flake-utils, gomod2nix }: flake-utils.lib.eachDefaultSystem (system:
-    let
-      pkgs = import nixpkgs {
-        inherit system;
-        overlays = [ gomod2nix.overlays.default ];
-      };
-      sanic = pkgs.buildGoApplication {
-        pname = "sanic";
-        version = "0.0.1";
-        src = ./.;
-        modules = ./gomod2nix.toml;
-      };
-      go-test = pkgs.stdenvNoCC.mkDerivation {
-        name = "go-test";
-        dontBuild = true;
-        src = ./.;
-        doCheck = true;
-        nativeBuildInputs = with pkgs; [
-          go
-          writableTmpDirAsHomeHook
-        ];
-        checkPhase = ''
-          go test -v ./...
-        '';
-        installPhase = ''
-          mkdir "$out"
-        '';
-      };
-      go-lint = pkgs.stdenvNoCC.mkDerivation {
-        name = "go-lint";
-        dontBuild = true;
-        src = ./.;
-        doCheck = true;
-        nativeBuildInputs = with pkgs; [
-          golangci-lint
-          go
-          writableTmpDirAsHomeHook
-        ];
-        checkPhase = ''
-          golangci-lint run
-        '';
-        installPhase = ''
-          mkdir "$out"
-        '';
-      };
-    in
+  outputs =
     {
-      checks = { inherit go-test go-lint; };
-      formatter = pkgs.nixpkgs-fmt;
-      devShells.default = pkgs.mkShell {
-        buildInputs = with pkgs; [
-          go
-          go-tools # staticcheck
-          gomod2nix.packages.${system}.default
-        ];
-        packages = with pkgs; [
-          mpd
-          mpc-cli
-          mkcert
-        ];
-      };
-      packages = {
-        default = sanic;
-        container = pkgs.dockerTools.buildImage {
-          name = "sanic";
-          config = {
-            Cmd = [ "${sanic}/bin/sanic" ];
+      self,
+      nixpkgs,
+      flake-utils,
+      gomod2nix,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ gomod2nix.overlays.default ];
+        };
+        golang = pkgs.go_1_25;
+        sanic = pkgs.buildGoApplication {
+          pname = "sanic";
+          version = "0.0.1";
+          go = golang;
+          src = ./.;
+          modules = ./gomod2nix.toml;
+        };
+        go-test = pkgs.stdenvNoCC.mkDerivation {
+          name = "go-test";
+          dontBuild = true;
+          src = ./.;
+          doCheck = true;
+          nativeBuildInputs = with pkgs; [
+            golang
+            writableTmpDirAsHomeHook
+          ];
+          checkPhase = ''
+            go test -v ./...
+          '';
+          installPhase = ''
+            mkdir "$out"
+          '';
+        };
+        go-lint = pkgs.stdenvNoCC.mkDerivation {
+          name = "go-lint";
+          dontBuild = true;
+          src = ./.;
+          doCheck = true;
+          nativeBuildInputs = with pkgs; [
+            #golangci-lint
+            golang
+            go-tools
+            writableTmpDirAsHomeHook
+          ];
+          checkPhase = ''
+            #golangci-lint run
+            staticcheck -f stylish ./...
+          '';
+          installPhase = ''
+            mkdir "$out"
+          '';
+        };
+      in
+      {
+        apps = {
+          test = {
+            type = "app";
+            program = "${pkgs.writeShellScript "test" ''
+              ${golang}/bin/go test -v ./...
+            ''}";
+          };
+          lint = {
+            type = "app";
+            program = "${pkgs.writeShellScript "lint" ''
+              ${pkgs.go-tools}/bin/staticcheck -f stylish ./...
+            ''}";
           };
         };
-      };
-      nixosModules.default = import ./option.nix;
-    }
-  );
+        checks = { inherit go-test go-lint; };
+        formatter = pkgs.nixfmt-tree;
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            golang
+            go-tools # staticcheck
+            gomod2nix.packages.${system}.default
+          ];
+          packages = with pkgs; [
+            mpd
+            mpc
+            mkcert
+          ];
+        };
+        packages = {
+          default = sanic;
+          container_old = pkgs.dockerTools.buildImage {
+            name = "sanic";
+            config = {
+              Cmd = [ "${sanic}/bin/sanic" ];
+            };
+          };
+          container = pkgs.dockerTools.buildLayeredImage {
+            name = "sanic";
+            tag = sanic.version;
+            contents = [ sanic ];
+            config.Cmd = [ "${sanic}/bin/sanic" ];
+          };
+        };
+        nixosModules.default = import ./option.nix;
+      }
+    );
 }
diff --git a/option.nix b/option.nix
index 4ce3e1e..5f022c2 100644
--- a/option.nix
+++ b/option.nix
@@ -1,8 +1,14 @@
-{ config, lib, pkgs, options, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  options,
+  ...
+}:
 
 let
   cfg = config.services.sanic;
-  configFile = pkgs.writeText "config.ini" (pkgs.lib.generators.toINI {} cfg);
+  configFile = pkgs.writeText "config.ini" (pkgs.lib.generators.toINI { } cfg);
   execCommand = "${cfg.package}/bin/sanic -c '${configFile}'";
 in
 {
@@ -11,7 +17,9 @@ in
     package = lib.mkOption {
       description = "Package to use.";
       type = lib.types.package;
-      default = sanic;
+      default = lib.literalExpression ''
+        pkgs.sanic
+      '';
     };
     ui = lib.mkOption {
       description = "Setting for HTTP(S) UI.";