diff --git a/flake.lock b/flake.lock
index add9b0c..5234a63 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1696343447,
-        "narHash": "sha256-B2xAZKLkkeRFG5XcHHSXXcP7To9Xzr59KXeZiRf4vdQ=",
+        "lastModified": 1698882062,
+        "narHash": "sha256-HkhafUayIqxXyHH1X8d9RDl1M2CkFgZLjKD3MzabiEo=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "c9afaba3dfa4085dbd2ccb38dfade5141e33d9d4",
+        "rev": "8c9fa2545007b49a5db5f650ae91f227672c3877",
         "type": "github"
       },
       "original": {
@@ -42,11 +42,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1697059129,
-        "narHash": "sha256-9NJcFF9CEYPvHJ5ckE8kvINvI84SZZ87PvqMbH6pro0=",
+        "lastModified": 1700390070,
+        "narHash": "sha256-de9KYi8rSJpqvBfNwscWdalIJXPo8NjdIZcEJum1mH0=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5e4c2ada4fcd54b99d56d7bd62f384511a7e2593",
+        "rev": "e4ad989506ec7d71f7302cc3067abd82730a4beb",
         "type": "github"
       },
       "original": {
@@ -56,11 +56,28 @@
         "type": "github"
       }
     },
+    "nixpkgs-for-iosl": {
+      "locked": {
+        "lastModified": 1700515317,
+        "narHash": "sha256-DSnKT3glZCKE0/Rc6ainSJUbUGC248HNKVRSbo9kxkM=",
+        "owner": "Luis-Hebendanz",
+        "repo": "nixpkgs",
+        "rev": "bcd6be7a5ab22c94c775945fb16a61b5867f15d2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Luis-Hebendanz",
+        "ref": "iosl",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "flake-parts": "flake-parts",
         "floco": "floco",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-for-iosl": "nixpkgs-for-iosl",
         "treefmt-nix": "treefmt-nix"
       }
     },
@@ -71,11 +88,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1695822946,
-        "narHash": "sha256-IQU3fYo0H+oGlqX5YrgZU3VRhbt2Oqe6KmslQKUO4II=",
+        "lastModified": 1699786194,
+        "narHash": "sha256-3h3EH1FXQkIeAuzaWB+nK0XK54uSD46pp+dMD3gAcB4=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "720bd006d855b08e60664e4683ccddb7a9ff614a",
+        "rev": "e82f32aa7f06bbbd56d7b12186d555223dc399d1",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 9e1a4e3..6c73ad1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,6 +7,7 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     floco.url = "github:aakropotkin/floco";
     floco.inputs.nixpkgs.follows = "nixpkgs";
+    nixpkgs-for-iosl.url = "github:Luis-Hebendanz/nixpkgs/iosl";
     flake-parts.url = "github:hercules-ci/flake-parts";
     flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
     treefmt-nix.url = "github:numtide/treefmt-nix";
diff --git a/pkgs/clan-cli/.vscode/settings.json b/pkgs/clan-cli/.vscode/settings.json
index e5c2632..0c7964c 100644
--- a/pkgs/clan-cli/.vscode/settings.json
+++ b/pkgs/clan-cli/.vscode/settings.json
@@ -18,5 +18,5 @@
     "python.linting.mypyPath": "mypy",
     "python.linting.mypyEnabled": true,
     "python.linting.enabled": true,
-    "python.defaultInterpreterPath": "python"
+    "python.defaultInterpreterPath": "/nix/store/k34qdl5397mwg3k00jsl3xcynij7n0z9-python3-3.11.6-env/bin/python"
 }
\ No newline at end of file
diff --git a/pkgs/clan-cli/clan_cli/types.py b/pkgs/clan-cli/clan_cli/clan_types.py
similarity index 100%
rename from pkgs/clan-cli/clan_cli/types.py
rename to pkgs/clan-cli/clan_cli/clan_types.py
diff --git a/pkgs/clan-cli/clan_cli/dirs.py b/pkgs/clan-cli/clan_cli/dirs.py
index 5f11577..ce5ff14 100644
--- a/pkgs/clan-cli/clan_cli/dirs.py
+++ b/pkgs/clan-cli/clan_cli/dirs.py
@@ -4,8 +4,8 @@ import sys
 from pathlib import Path
 from typing import Optional
 
+from .clan_types import FlakeName
 from .errors import ClanError
-from .types import FlakeName
 
 log = logging.getLogger(__name__)
 
diff --git a/pkgs/clan-cli/clan_cli/webui/api_inputs.py b/pkgs/clan-cli/clan_cli/webui/api_inputs.py
index 70539e7..1148c7b 100644
--- a/pkgs/clan-cli/clan_cli/webui/api_inputs.py
+++ b/pkgs/clan-cli/clan_cli/webui/api_inputs.py
@@ -5,8 +5,8 @@ from typing import Any
 from pydantic import AnyUrl, BaseModel, validator
 from pydantic.tools import parse_obj_as
 
+from ..clan_types import validate_path
 from ..dirs import clan_data_dir, clan_flakes_dir
-from ..types import validate_path
 
 DEFAULT_URL = parse_obj_as(AnyUrl, "http://localhost:8000")
 
diff --git a/pkgs/clan-cli/clan_cli/webui/app.py b/pkgs/clan-cli/clan_cli/webui/app.py
index 88ff380..f33bbf1 100644
--- a/pkgs/clan-cli/clan_cli/webui/app.py
+++ b/pkgs/clan-cli/clan_cli/webui/app.py
@@ -1,4 +1,6 @@
 import logging
+from contextlib import asynccontextmanager
+from typing import Any
 
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
@@ -8,7 +10,7 @@ from fastapi.staticfiles import StaticFiles
 from ..errors import ClanError
 from .assets import asset_path
 from .error_handlers import clan_error_handler
-from .routers import health, root
+from .routers import health, root, socket_manager2
 
 origins = [
     "http://localhost:3000",
@@ -17,8 +19,15 @@ origins = [
 log = logging.getLogger(__name__)
 
 
+@asynccontextmanager
+async def lifespan(app: FastAPI) -> Any:
+    await socket_manager2.brd.connect()
+    yield
+    await socket_manager2.brd.disconnect()
+
+
 def setup_app() -> FastAPI:
-    app = FastAPI()
+    app = FastAPI(lifespan=lifespan)
     app.add_middleware(
         CORSMiddleware,
         allow_origins=origins,
@@ -29,9 +38,11 @@ def setup_app() -> FastAPI:
 
     app.include_router(health.router)
 
+    app.include_router(socket_manager2.router)
+
     # Needs to be last in register. Because of wildcard route
     app.include_router(root.router)
-    app.add_exception_handler(ClanError, clan_error_handler)
+    app.add_exception_handler(ClanError, clan_error_handler)  # type: ignore
 
     app.mount("/static", StaticFiles(directory=asset_path()), name="static")
 
diff --git a/pkgs/clan-cli/clan_cli/webui/routers/messenger.html b/pkgs/clan-cli/clan_cli/webui/routers/messenger.html
new file mode 100644
index 0000000..cdc6618
--- /dev/null
+++ b/pkgs/clan-cli/clan_cli/webui/routers/messenger.html
@@ -0,0 +1,205 @@
+<!doctype html>
+<html>
+  <head>
+    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
+    <script>
+      $(document).ready(function () {
+        if (typeof WebSocket != "undefined") {
+          $("#ask").show();
+        } else {
+          $("#error").show();
+        }
+
+        // join on enter
+        $("#ask input").keydown(function (event) {
+          if (event.keyCode == 13) {
+            $("#ask a").click();
+          }
+        });
+
+        // join on click
+        $("#ask a").click(function () {
+          join($("#ask input").val());
+          $("#ask").hide();
+          $("#channel").show();
+          $("input#message").focus();
+        });
+
+        function join(name) {
+          var host = window.location.host.split(":")[0];
+          var ws = new WebSocket("ws://localhost:2979/ws2");
+
+          var container = $("div#msgs");
+          ws.onmessage = function (evt) {
+            var obj = JSON.parse(evt.data);
+            if (typeof obj != "object") return;
+            console.log("Received: " + obj);
+
+            var action = obj["action"];
+            var struct = container.find("li." + action + ":first");
+            if (struct.length < 1) {
+              console.log("Could not handle: " + evt.data);
+              return;
+            }
+
+            var msg = struct.clone();
+            msg.find(".time").text(new Date().toString("HH:mm:ss"));
+
+            if (action == "message") {
+              var matches;
+              if ((matches = obj["message"].match(/^\s*[\/\\]me\s(.*)/))) {
+                msg.find(".user").text(obj["user"] + " " + matches[1]);
+                msg.find(".user").css("font-weight", "bold");
+              } else {
+                msg.find(".user").text(obj["user"]);
+                msg.find(".message").text(": " + obj["message"]);
+              }
+            } else if (action == "control") {
+              msg.find(".user").text(obj["user"]);
+              msg.find(".message").text(obj["message"]);
+              msg.addClass("control");
+            }
+
+            if (obj["user"] == name) msg.find(".user").addClass("self");
+            container.find("ul").append(msg.show());
+            container.scrollTop(container.find("ul").innerHeight());
+          };
+
+          $("#channel form").submit(function (event) {
+            event.preventDefault();
+            var input = $(this).find(":input");
+            var msg = input.val();
+            if (msg) {
+              ws.send(
+                JSON.stringify({ action: "message", user: name, message: msg }),
+              );
+            }
+            input.val("");
+          });
+        }
+      });
+    </script>
+    <style type="text/css" media="screen">
+      * {
+        font-family: Georgia;
+      }
+      a {
+        color: #000;
+        text-decoration: none;
+      }
+      a:hover {
+        text-decoration: underline;
+      }
+      div.bordered {
+        margin: 0 auto;
+        margin-top: 100px;
+        width: 600px;
+        padding: 20px;
+        text-align: center;
+        border: 10px solid #ddd;
+        -webkit-border-radius: 20px;
+      }
+      #error {
+        background-color: #ba0000;
+        color: #fff;
+        font-weight: bold;
+      }
+      #ask {
+        font-size: 20pt;
+      }
+      #ask input {
+        font-size: 20pt;
+        padding: 10px;
+        margin: 0 10px;
+      }
+      #ask span.join {
+        padding: 10px;
+        background-color: #ddd;
+        -webkit-border-radius: 10px;
+      }
+      #channel {
+        margin-top: 100px;
+        height: 480px;
+        position: relative;
+      }
+      #channel div#descr {
+        position: absolute;
+        left: -10px;
+        top: -190px;
+        font-size: 13px;
+        text-align: left;
+        line-height: 20px;
+        padding: 5px;
+        width: 630px;
+      }
+      div#msgs {
+        overflow-y: scroll;
+        height: 400px;
+      }
+      div#msgs ul {
+        list-style: none;
+        padding: 0;
+        margin: 0;
+        text-align: left;
+      }
+      div#msgs li {
+        line-height: 20px;
+      }
+      div#msgs li span.user {
+        color: #ff9900;
+      }
+      div#msgs li span.user.self {
+        color: #aa2211;
+      }
+      div#msgs li span.time {
+        float: right;
+        margin-right: 5px;
+        color: #aaa;
+        font-family: "Courier New";
+        font-size: 12px;
+      }
+      div#msgs li.control {
+        text-align: center;
+      }
+      div#msgs li.control span.message {
+        color: #aaa;
+      }
+      div#input {
+        text-align: left;
+        margin-top: 20px;
+      }
+      div#input #message {
+        width: 600px;
+        border: 5px solid #bbb;
+        -webkit-border-radius: 3px;
+        font-size: 30pt;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="error" class="bordered" style="display: none">
+      This browser has no native WebSocket support.<br />
+      Use a WebKit nightly or Google Chrome.
+    </div>
+    <div id="ask" class="bordered" style="display: none">
+      Name: <input type="text" id="name" />
+      <a href="#"><span class="join">Join!</span></a>
+    </div>
+    <div id="channel" class="bordered" style="display: none">
+      <div id="descr" class="bordered">
+        <strong>Tip:</strong> Open up another browser window to chat.
+      </div>
+      <div id="msgs">
+        <ul>
+          <li class="message" style="display: none">
+            <span class="user"></span><span class="message"></span>
+            <span class="time"></span>
+          </li>
+        </ul>
+      </div>
+      <div id="input">
+        <form><input type="text" id="message" /></form>
+      </div>
+    </div>
+  </body>
+</html>
diff --git a/pkgs/clan-cli/clan_cli/webui/routers/socket_manager2.py b/pkgs/clan-cli/clan_cli/webui/routers/socket_manager2.py
new file mode 100644
index 0000000..66391f6
--- /dev/null
+++ b/pkgs/clan-cli/clan_cli/webui/routers/socket_manager2.py
@@ -0,0 +1,52 @@
+# Requires: `starlette`, `uvicorn`, `jinja2`
+# Run with `uvicorn example:app`
+import logging
+import os
+
+import anyio
+from broadcaster import Broadcast
+from fastapi import APIRouter, WebSocket
+from fastapi.responses import HTMLResponse
+
+log = logging.getLogger(__name__)
+router = APIRouter()
+
+
+brd = Broadcast("memory://")
+
+
+@router.get("/ws2_example")
+async def get() -> HTMLResponse:
+    html = open(f"{os.getcwd()}/webui/routers/messenger.html").read()
+    return HTMLResponse(html)
+
+
+@router.websocket("/ws2")
+async def chatroom_ws(websocket: WebSocket) -> None:
+    await websocket.accept()
+
+    async with anyio.create_task_group() as task_group:
+        # run until first is complete
+        async def run_chatroom_ws_receiver() -> None:
+            await chatroom_ws_receiver(websocket=websocket)
+            task_group.cancel_scope.cancel()
+
+        task_group.start_soon(run_chatroom_ws_receiver)
+        log.warning("Started chatroom_ws_sender")
+
+        await chatroom_ws_sender(websocket)
+
+
+async def chatroom_ws_receiver(websocket: WebSocket) -> None:
+    async for message in websocket.iter_text():
+        log.warning(f"Received message: {message}")
+        await brd.publish(channel="chatroom", message=message)
+
+
+async def chatroom_ws_sender(websocket: WebSocket) -> None:
+    async with brd.subscribe(channel="chatroom") as subscriber:
+        if subscriber is None:
+            log.error("Subscriber is None")
+            return
+        async for event in subscriber:  # type: ignore
+            await websocket.send_text(event.message)
diff --git a/pkgs/clan-cli/default.nix b/pkgs/clan-cli/default.nix
index a9f4b66..42347b6 100644
--- a/pkgs/clan-cli/default.nix
+++ b/pkgs/clan-cli/default.nix
@@ -36,6 +36,8 @@
 , mypy
 , sqlalchemy
 , websockets
+, deal
+, broadcaster
 }:
 let
 
@@ -45,6 +47,8 @@ let
     uvicorn # optional dependencies: if not enabled, webui subcommand will not work
     sqlalchemy
     websockets
+    broadcaster
+    deal
   ];
 
   pytestDependencies = runtimeDependencies ++ dependencies ++ [
diff --git a/pkgs/clan-cli/flake-module.nix b/pkgs/clan-cli/flake-module.nix
index 2f912d0..5e3719c 100644
--- a/pkgs/clan-cli/flake-module.nix
+++ b/pkgs/clan-cli/flake-module.nix
@@ -1,6 +1,6 @@
 { inputs, ... }:
 {
-  perSystem = { self', pkgs, ... }: {
+  perSystem = { self', pkgs, system, ... }: {
     devShells.clan-cli = pkgs.callPackage ./shell.nix {
       inherit (self'.packages) clan-cli ui-assets nix-unit;
     };
@@ -8,6 +8,8 @@
       clan-cli = pkgs.python3.pkgs.callPackage ./default.nix {
         inherit (self'.packages) ui-assets;
         inherit (inputs) nixpkgs;
+        inherit (inputs.nixpkgs-for-iosl.legacyPackages.${system}.python3Packages) deal;
+        inherit (inputs.nixpkgs-for-iosl.legacyPackages.${system}.python3Packages) broadcaster;
       };
       inherit (self'.packages.clan-cli) clan-openapi;
       default = self'.packages.clan-cli;
diff --git a/pkgs/clan-cli/pyproject.toml b/pkgs/clan-cli/pyproject.toml
index ab64f5d..3f48ba3 100644
--- a/pkgs/clan-cli/pyproject.toml
+++ b/pkgs/clan-cli/pyproject.toml
@@ -49,6 +49,11 @@ ignore_missing_imports = true
 module = "pytest.*"
 ignore_missing_imports = true
 
+[[tool.mypy.overrides]]
+module = "anyio.*"
+ignore_missing_imports = true
+
+
 [[tool.mypy.overrides]]
 module = "setuptools.*"
 ignore_missing_imports = true
diff --git a/pkgs/nix-unit/default.nix b/pkgs/nix-unit/default.nix
index 507ed57..fe917f0 100644
--- a/pkgs/nix-unit/default.nix
+++ b/pkgs/nix-unit/default.nix
@@ -1,43 +1,9 @@
-{ stdenv
-, lib
-, nixVersions
-, fetchFromGitHub
-, nlohmann_json
-, boost
-, meson
-, pkg-config
-, ninja
-, cmake
-, clang-tools
-}:
-
-stdenv.mkDerivation {
-  pname = "nix-unit";
-  version = "0.1";
-  src = fetchFromGitHub {
-    owner = "adisbladis";
-    repo = "nix-unit";
-    rev = "3ed2378bddad85257fc508a291408f9ed9673d01";
-    sha256 = "sha256-HvMq0TJGYSx37zHm4j2d+JUZx4/6X7xKEt/0DeCiwjQ=";
+{ callPackage }:
+let
+  nix-unit-src = builtins.fetchGit {
+    url = "https://github.com/adisbladis/nix-unit";
+    rev = "7e2ee1c70f930b9b65b9fc33c3f3eca0dfae00d1";
   };
-  buildInputs = [
-    nlohmann_json
-    nixVersions.stable
-    boost
-  ];
-  nativeBuildInputs = [
-    meson
-    pkg-config
-    ninja
-    # nlohmann_json can be only discovered via cmake files
-    cmake
-  ] ++ (lib.optional stdenv.cc.isClang [ clang-tools ]);
+in
+callPackage nix-unit-src { }
 
-  meta = {
-    description = "Nix unit test runner";
-    homepage = "https://github.com/adisbladis/nix-unit";
-    license = lib.licenses.gpl3;
-    maintainers = with lib.maintainers; [ adisbladis ];
-    platforms = lib.platforms.unix;
-  };
-}