diff --git a/pkgs/development/python-modules/dependency-groups/default.nix b/pkgs/development/python-modules/dependency-groups/default.nix
new file mode 100644
index 000000000000..bf0f83d276d9
--- /dev/null
+++ b/pkgs/development/python-modules/dependency-groups/default.nix
@@ -0,0 +1,44 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  flit-core,
+  packaging,
+  pythonOlder,
+  pytestCheckHook,
+}:
+
+buildPythonPackage rec {
+  pname = "dependency-groups";
+  version = "1.3.1";
+  pyproject = true;
+
+  disabled = pythonOlder "3.12";
+
+  src = fetchFromGitHub {
+    owner = "pypa";
+    repo = "dependency-groups";
+    rev = version;
+    hash = "sha256-suuSx3zf0Y45FJdH8Cb6N7hcvPnzleREpHhtdiG2CLg=";
+  };
+
+  build-system = [ flit-core ];
+
+  dependencies = [ packaging ];
+
+  optional-dependencies = {
+    cli = [ ];
+  };
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  pythonImportsCheck = [ "dependency_groups" ];
+
+  meta = {
+    description = "Standalone implementation of PEP 735 Dependency Groups";
+    homepage = "https://github.com/pypa/dependency-groups";
+    changelog = "https://github.com/pypa/dependency-groups/blob/${src.rev}/CHANGELOG.rst";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/development/python-modules/nox/default.nix b/pkgs/development/python-modules/nox/default.nix
index 91e23202c525..78777f18b4d8 100644
--- a/pkgs/development/python-modules/nox/default.nix
+++ b/pkgs/development/python-modules/nox/default.nix
@@ -1,15 +1,24 @@
 {
   lib,
-  argcomplete,
   buildPythonPackage,
-  colorlog,
   fetchFromGitHub,
-  hatchling,
-  jinja2,
-  packaging,
-  pytestCheckHook,
   pythonOlder,
-  tomli,
+
+  # build-system
+  hatchling,
+
+  # dependencies
+  attrs,
+  argcomplete,
+  colorlog,
+  dependency-groups,
+  jinja2,
+
+  # tests
+  pytestCheckHook,
+  writableTmpDirAsHomeHook,
+
+  # passthru
   tox,
   uv,
   virtualenv,
@@ -17,33 +26,26 @@
 
 buildPythonPackage rec {
   pname = "nox";
-  version = "2024.10.09";
+  version = "2025.05.01";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
+  disabled = pythonOlder "3.12";
 
   src = fetchFromGitHub {
     owner = "wntrblm";
     repo = "nox";
     tag = version;
-    hash = "sha256-GdNz34A8IKwPG/270sY5t3SoggGCZMWfDq/Wyhk0ez8=";
+    hash = "sha256-qH8oh7tmiJkXOobyDZMRZ62w2sRHJF8sh4PX+6s7M70=";
   };
 
-  patches = [
-    # Backport of https://github.com/wntrblm/nox/pull/903, which can be removed on next release
-    ./fix-broken-mock-on-cpython-3.12.8.patch
-  ];
-
   build-system = [ hatchling ];
 
   dependencies = [
+    attrs
     argcomplete
     colorlog
-    packaging
+    dependency-groups
     virtualenv
-  ]
-  ++ lib.optionals (pythonOlder "3.11") [
-    tomli
   ];
 
   optional-dependencies = {
@@ -54,19 +56,20 @@ buildPythonPackage rec {
     uv = [ uv ];
   };
 
-  nativeCheckInputs = [ pytestCheckHook ];
-
-  preCheck = ''
-    export HOME=$(mktemp -d)
-  '';
+  nativeCheckInputs = [
+    pytestCheckHook
+    writableTmpDirAsHomeHook
+  ];
 
   pythonImportsCheck = [ "nox" ];
 
   disabledTests = [
-    # our conda is not available on 3.11
-    "test__create_venv_options"
     # Assertion errors
     "test_uv"
+    # Test requires network access
+    "test_noxfile_script_mode_url_req"
+    # Don't test CLi mode
+    "test_noxfile_script_mode"
   ];
 
   disabledTestPaths = [
@@ -74,12 +77,12 @@ buildPythonPackage rec {
     "tests/test_tox_to_nox.py"
   ];
 
-  meta = with lib; {
+  meta = {
     description = "Flexible test automation for Python";
     homepage = "https://nox.thea.codes/";
-    changelog = "https://github.com/wntrblm/nox/blob/${version}/CHANGELOG.md";
-    license = licenses.asl20;
-    maintainers = with maintainers; [
+    changelog = "https://github.com/wntrblm/nox/blob/${src.tag}/CHANGELOG.md";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [
       doronbehar
       fab
     ];
diff --git a/pkgs/development/python-modules/nox/fix-broken-mock-on-cpython-3.12.8.patch b/pkgs/development/python-modules/nox/fix-broken-mock-on-cpython-3.12.8.patch
deleted file mode 100644
index f634c3534b93..000000000000
--- a/pkgs/development/python-modules/nox/fix-broken-mock-on-cpython-3.12.8.patch
+++ /dev/null
@@ -1,35 +0,0 @@
-diff --git a/nox/command.py b/nox/command.py
-index 671875c..4984168 100644
---- a/nox/command.py
-+++ b/nox/command.py
-@@ -30,6 +30,8 @@ TYPE_CHECKING = False
- if TYPE_CHECKING:
-     from typing import IO
- 
-+_PLATFORM = sys.platform
-+
- ExternalType = Literal["error", True, False]
- 
- 
-@@ -63,7 +65,7 @@ def _clean_env(env: Mapping[str, str | None] | None = None) -> dict[str, str] |
-     clean_env = {k: v for k, v in env.items() if v is not None}
- 
-     # Ensure systemroot is passed down, otherwise Windows will explode.
--    if sys.platform == "win32":
-+    if _PLATFORM.startswith("win"):
-         clean_env.setdefault("SYSTEMROOT", os.environ.get("SYSTEMROOT", ""))
- 
-     return clean_env
-diff --git a/tests/test_command.py b/tests/test_command.py
-index ae398e9..904cf34 100644
---- a/tests/test_command.py
-+++ b/tests/test_command.py
-@@ -157,7 +157,7 @@ def test_run_env_remove(monkeypatch):
-     )
- 
- 
--@mock.patch("sys.platform", "win32")
-+@mock.patch("nox.command._PLATFORM", "win32")
- def test_run_env_systemroot():
-     systemroot = os.environ.setdefault("SYSTEMROOT", "sigil")
- 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8dc9e021d2e5..bff0f1a6d500 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3553,6 +3553,8 @@ self: super: with self; {
 
   dep-logic = callPackage ../development/python-modules/dep-logic { };
 
+  dependency-groups = callPackage ../development/python-modules/dependency-groups { };
+
   dependency-injector = callPackage ../development/python-modules/dependency-injector { };
 
   deploykit = callPackage ../development/python-modules/deploykit { };