diff --git a/pkgs/development/python-modules/pycec/default.nix b/pkgs/development/python-modules/pycec/default.nix
index add007fee470..b1f67bd8bb98 100644
--- a/pkgs/development/python-modules/pycec/default.nix
+++ b/pkgs/development/python-modules/pycec/default.nix
@@ -4,12 +4,13 @@
   fetchFromGitHub,
   libcec,
   pytestCheckHook,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "pycec";
   version = "0.6.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "konikvranik";
@@ -18,7 +19,14 @@ buildPythonPackage rec {
     hash = "sha256-5KQyHjAvHWeHFqcFHFJxDOPwWuVcFAN2wVdz9a77dzU=";
   };
 
-  propagatedBuildInputs = [ libcec ];
+  patches = [
+    # https://github.com/konikvranik/pyCEC/pull/84
+    ./python-3.14-compat.patch
+  ];
+
+  build-system = [ setuptools ];
+
+  dependencies = [ libcec ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/pycec/python-3.14-compat.patch b/pkgs/development/python-modules/pycec/python-3.14-compat.patch
new file mode 100644
index 000000000000..1a2a4590a10c
--- /dev/null
+++ b/pkgs/development/python-modules/pycec/python-3.14-compat.patch
@@ -0,0 +1,31 @@
+From 1384a554579747c0f91a859f1992aa7015db2dc7 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
+Date: Thu, 5 Mar 2026 01:17:28 +0100
+Subject: [PATCH] Fix tests under Python 3.14
+
+---
+ tests/test_hdmi_network.py | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/tests/test_hdmi_network.py b/tests/test_hdmi_network.py
+index 972b9ec..48ba8bb 100644
+--- a/tests/test_hdmi_network.py
++++ b/tests/test_hdmi_network.py
+@@ -12,7 +12,7 @@
+ 
+ 
+ def test_devices():
+-    loop = asyncio.get_event_loop()
++    loop = asyncio.new_event_loop()
+     network = HDMINetwork(
+         MockAdapter(
+             [
+@@ -56,7 +56,7 @@ def test_devices():
+ 
+ 
+ def test_scan():
+-    loop = asyncio.get_event_loop()
++    loop = asyncio.new_event_loop()
+     network = HDMINetwork(
+         MockAdapter(
+             [