diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 32a27e73c3b6..1b4c2b851e33 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -2,7 +2,7 @@
 # Do not edit!
 
 {
-  version = "2024.12.3";
+  version = "2024.12.4";
   components = {
     "3_day_blinds" =
       ps: with ps; [
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 3aba836667ff..a99cb5cb50fb 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -451,7 +451,7 @@ let
   extraBuildInputs = extraPackages python.pkgs;
 
   # Don't forget to run update-component-packages.py after updating
-  hassVersion = "2024.12.3";
+  hassVersion = "2024.12.4";
 
 in
 python.pkgs.buildPythonApplication rec {
@@ -472,13 +472,13 @@ python.pkgs.buildPythonApplication rec {
     owner = "home-assistant";
     repo = "core";
     rev = "refs/tags/${version}";
-    hash = "sha256-vsN5FR/XCMGLxOrKS4Zx35fSucDG7WzG27HCj6mAAIQ=";
+    hash = "sha256-1zvJCxPM6G4uTjSBesKu21Wde2xu1mEnWa2jYiw5ypo=";
   };
 
   # Secondary source is pypi sdist for translations
   sdist = fetchPypi {
     inherit pname version;
-    hash = "sha256-VgobmCK4RITzUuIWbOc5mzzIJh4vLnmRMEzfR8k0uy4=";
+    hash = "sha256-XoII6cDT0aNoGJ8iXDanFOlzOwrSxQAcSHfL2n3QmQg=";
   };
 
   build-system = with python.pkgs; [
diff --git a/pkgs/servers/home-assistant/stubs.nix b/pkgs/servers/home-assistant/stubs.nix
index 15a33aba4367..14bf031a6c05 100644
--- a/pkgs/servers/home-assistant/stubs.nix
+++ b/pkgs/servers/home-assistant/stubs.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "homeassistant-stubs";
-  version = "2024.12.3";
+  version = "2024.12.4";
   pyproject = true;
 
   disabled = python.version != home-assistant.python.version;
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     owner = "KapJI";
     repo = "homeassistant-stubs";
     rev = "refs/tags/${version}";
-    hash = "sha256-fLJJi6X8x+yhTObF8tutMVArsbgdu5MAzO5eJvlnAtg=";
+    hash = "sha256-BHcL7t/LcSWthb902yYRC8w8hN34vuSsDcANSZXmYdk=";
   };
 
   build-system = [
diff --git a/pkgs/servers/home-assistant/update-component-packages.py b/pkgs/servers/home-assistant/update-component-packages.py
index 088a04283de8..68301faf35ec 100755
--- a/pkgs/servers/home-assistant/update-component-packages.py
+++ b/pkgs/servers/home-assistant/update-component-packages.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env nix-shell
-#! nix-shell -i python3 -p "python3.withPackages (ps: with ps; [ packaging rich ])" -p pyright ruff isort
+#! nix-shell -i python3 -p "python3.withPackages (ps: with ps; [ packaging rich ])" -p pyright ruff isort nixfmt-rfc-style
 #
 # This script downloads Home Assistant's source tarball.
 # Inside the homeassistant/components directory, each integration has an associated manifest.json,
@@ -279,7 +279,8 @@ def main() -> None:
         else:
             build_inputs[component] = (attr_paths, extra_attrs, missing_reqs)
 
-    with open(os.path.dirname(sys.argv[0]) + "/component-packages.nix", "w") as f:
+    outpath = os.path.dirname(sys.argv[0]) + "/component-packages.nix"
+    with open(outpath, "w") as f:
         f.write("# Generated by update-component-packages.py\n")
         f.write("# Do not edit!\n\n")
         f.write("{\n")
@@ -307,6 +308,8 @@ def main() -> None:
         f.write("  ];\n")
         f.write("}\n")
 
+    run_sync(["nixfmt", outpath])
+
     supported_components = reduce(lambda n, c: n + (build_inputs[c][2] == []),
                                   components.keys(), 0)
     total_components = len(components)