diff --git a/pkgs/development/python-modules/sphinxcontrib-actdiag/default.nix b/pkgs/development/python-modules/sphinxcontrib-actdiag/default.nix
new file mode 100644
index 00000000000..81fa9831256
--- /dev/null
+++ b/pkgs/development/python-modules/sphinxcontrib-actdiag/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, sphinx
+, actdiag
+, blockdiag
+}:
+
+buildPythonPackage rec {
+  pname = "sphinxcontrib-actdiag";
+  version = "2.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-TtuFZOLkig4MULLndDQlrTTx8RiGw34MsjmXoPladMY=";
+  };
+
+  propagatedBuildInputs = [ sphinx actdiag blockdiag ];
+
+  pythonImportsCheck = [ "sphinxcontrib.actdiag" ];
+
+  meta = with lib; {
+    description = "Sphinx actdiag extension";
+    homepage = "https://github.com/blockdiag/sphinxcontrib-actdiag";
+    maintainers = with maintainers; [ davidtwco ];
+    license = licenses.bsd2;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 0d75625019b..4786a7e5b76 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7690,6 +7690,8 @@ in {
 
   spinners = callPackage ../development/python-modules/spinners { };
 
+  sphinxcontrib-actdiag = callPackage ../development/python-modules/sphinxcontrib-actdiag { };
+
   sphinxcontrib-applehelp = callPackage ../development/python-modules/sphinxcontrib-applehelp { };
 
   sphinxcontrib-autoapi = callPackage ../development/python-modules/sphinxcontrib-autoapi { };