diff --git a/flake.nix b/flake.nix
index 0199b8cb..3ac143c9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -316,6 +316,7 @@
 
         mkJupyterlab = {
           jupyterlabEnvArgs ? {},
+          notebookConfig ? {},
           kernels ? k: [], # k: [ (k.python {}) k.bash ],
           # extensions ? e: [], # e: [ e.jupy-ext ]
           runtimePackages ? [], # runtime package available to all binaries
@@ -394,7 +395,7 @@
             # make jupyter config and data directories
             mkdir -p $out/config $out/data
             echo "c.NotebookApp.use_redirect_file = False" > $out/config/jupyter_notebook_config.py
-
+            echo '${builtins.toJSON notebookConfig}' > $out/config/jupyter_notebook_config.json
             # make jupyter lab user settings and workspaces directories
             mkdir -p $out/config/lab/{user-settings,workspaces}
           '';
diff --git a/modules/conf/jupyter_notebook_config.json b/modules/conf/jupyter_notebook_config.json
new file mode 100644
index 00000000..c1243385
--- /dev/null
+++ b/modules/conf/jupyter_notebook_config.json
@@ -0,0 +1,13 @@
+{
+  "LanguageServerManager": {
+    "language_servers": {
+      "haskell-language-server": {
+        "version": 2,
+        "argv": ["haskell-language-server-wrapper", "lsp"],
+        "languages": ["haskell"],
+        "display_name": "haskell-language-server",
+        "mimetypes": ["text/haskell", "text/x-haskell"]
+      }
+    }
+  }
+}
diff --git a/modules/default.nix b/modules/default.nix
index 3cd40c77..510446c6 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -19,6 +19,13 @@ in {
         description = "A list of runtime packages available to all binaries";
         default = [];
       };
+      notebookConfig = lib.mkOption {
+        type = types.attrs;
+        description = "jupyter notebook config which will be written to jupyter_notebook_config.py";
+        default = {};
+        apply = c: lib.recursiveUpdate (lib.importJSON ./conf/jupyter_notebook_config.json) c;
+      };
+
       extensions = {
         features = lib.mkOption {
           type = types.listOf types.str;
@@ -35,7 +42,7 @@ in {
                 type = types.functionTo types.package;
                 description = "Python language server";
                 default = ps: ps.python-lsp-server;
-                example = lib.literalExample ''
+                example = lib.literalExpression ''
                   if you want to use pyls-mypy or othter dependencies, you can do:
                   extraPackages = ps: [] ++ python-lsp-server.passthru.optional-dependencies.all;
                 '';
@@ -44,7 +51,7 @@ in {
                 type = types.package;
                 description = "Haskell language server";
                 default = config.nixpkgs.haskell-language-server;
-                example = lib.literalExample ''
+                example = lib.literalExpression ''
                   config.nixpkgs.haskell-language-server.override { supportedGhcVersions = [ "90" "94" ]; };
                 '';
               };
@@ -140,7 +147,7 @@ in {
             poetry2nix
             ;
 
-          # all of packages should be kept in extraPackages, instead of runtimePackages
+          # all of python packages should be kept in extraPackages, instead of runtimePackages
           extraPackages = ps:
             (lib.optionals (enabledLanguage "python" "lsp") [
               (config.jupyterlab.extensions.languageServers.python ps)
@@ -150,6 +157,8 @@ in {
             ++ (config.jupyterlab.jupyterlabEnvArgs.extraPackages ps);
         };
 
+        notebookConfig = config.jupyterlab.notebookConfig;
+
         runtimePackages =
           config.jupyterlab.runtimePackages
           ++ (lib.optionals (enabledLanguage "haskell" "lsp") [
diff --git a/template/lsp.nix b/template/lsp.nix
new file mode 100644
index 00000000..222238cb
--- /dev/null
+++ b/template/lsp.nix
@@ -0,0 +1,32 @@
+{
+  pkgs,
+  config,
+  ...
+}: {
+  jupyterlab = {
+    extensions = {
+      features = ["lsp" "jupytext"];
+      languageServers = {
+        python = ps: ps.python-lsp-server;
+      };
+    };
+    notebookConfig = {
+      # add your custom language server config here or other notebook config for the jupyterlab_notebook_config.json
+      # LanguageServerManager.language_servers.custom-language-servers
+      #   "argv" = ["haskell-language-server" "--lsp"];
+      #   "languages" = ["haskell"];
+      #   "display_name" = "haskell-language-server";
+      #   "mimetypes" = ["text/haskell" "text/x-haskell"];
+      # };
+    };
+    runtimePackages = [];
+    jupyterlabEnvArgs.extraPackages = ps: ([] ++ ps.python-lsp-server.passthru.optional-dependencies.all);
+  };
+  kernel.python.minimal = {
+    enable = true;
+  };
+  kernel.haskell.minimal = {
+    enable = true;
+    haskellCompiler = "ghc902";
+  };
+}