diff --git a/pkgs/servers/home-assistant/custom-components/thewatchman/package.nix b/pkgs/servers/home-assistant/custom-components/thewatchman/package.nix
new file mode 100644
index 000000000000..af7339976dfc
--- /dev/null
+++ b/pkgs/servers/home-assistant/custom-components/thewatchman/package.nix
@@ -0,0 +1,49 @@
+{
+  lib,
+  buildHomeAssistantComponent,
+  fetchFromGitHub,
+  prettytable,
+  pytest-cov-stub,
+  pytest-homeassistant-custom-component,
+  pytestCheckHook,
+}:
+
+buildHomeAssistantComponent rec {
+  owner = "dummylabs";
+  domain = "watchman";
+  version = "0.7.0-beta.1";
+
+  src = fetchFromGitHub {
+    owner = "dummylabs";
+    repo = "thewatchman";
+    tag = "v${version}";
+    hash = "sha256-U2AYxQ37XQocHcnY2Uv9Lhu0LmEZhhcGdO29i565tBM=";
+  };
+
+  postPatch = ''
+    substituteInPlace custom_components/watchman/manifest.json \
+      --replace-fail "prettytable==3.12.0" "prettytable"
+
+    substituteInPlace tests/{__init__,test_{action,regex,report}}.py \
+      --replace-fail "/workspaces/thewatchman/" ""
+  '';
+
+  dontBuild = true;
+
+  dependencies = [
+    prettytable
+  ];
+
+  nativeCheckInputs = [
+    pytest-cov-stub
+    pytest-homeassistant-custom-component
+    pytestCheckHook
+  ];
+
+  meta = with lib; {
+    description = "Keep track of missing entities and services in your config files";
+    homepage = "https://github.com/dummylabs/thewatchman";
+    maintainers = with maintainers; [ SuperSandro2000 ];
+    license = licenses.mit;
+  };
+}