diff --git a/pkgs/development/python-modules/colcon-defaults/default.nix b/pkgs/development/python-modules/colcon-defaults/default.nix
new file mode 100644
index 000000000000..ec88506b73e7
--- /dev/null
+++ b/pkgs/development/python-modules/colcon-defaults/default.nix
@@ -0,0 +1,61 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  # build-system
+  setuptools,
+  #dependencies
+  colcon,
+  pyaml,
+  # tests
+  pytestCheckHook,
+  pytest-cov-stub,
+  pytest-repeat,
+  pytest-rerunfailures,
+  scspell,
+  writableTmpDirAsHomeHook,
+}:
+buildPythonPackage rec {
+  pname = "colcon-defaults";
+  version = "0.2.9";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "colcon";
+    repo = "colcon-defaults";
+    tag = version;
+    hash = "sha256-Nb6D9jpbCvUnCNgRLBgWQFybNx0hyWVLSKj6gmTWjVs=";
+  };
+
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
+    colcon
+    pyaml
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+    pytest-cov-stub
+    pytest-repeat
+    pytest-rerunfailures
+    scspell
+    writableTmpDirAsHomeHook
+  ];
+
+  disabledTestPaths = [
+    # Skip formatting checks to prevent depending on flake8
+    "test/test_flake8.py"
+  ];
+
+  pythonImportsCheck = [ "colcon_defaults" ];
+
+  meta = {
+    description = "Extension for colcon to read defaults from a config file";
+    homepage = "https://github.com/colcon/colcon-defaults";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ guelakais ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 23bce3243eca..a8cd8cf40b74 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2665,6 +2665,8 @@ self: super: with self; {
 
   colcon-argcomplete = callPackage ../development/python-modules/colcon-argcomplete { };
 
+  colcon-defaults = callPackage ../development/python-modules/colcon-defaults { };
+
   collections-extended = callPackage ../development/python-modules/collections-extended { };
 
   collidoscope = callPackage ../development/python-modules/collidoscope { };