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/development/python-modules/sphinxcontrib-nwdiag/default.nix b/pkgs/development/python-modules/sphinxcontrib-nwdiag/default.nix
new file mode 100644
index 00000000000..10963a73a91
--- /dev/null
+++ b/pkgs/development/python-modules/sphinxcontrib-nwdiag/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, sphinx
+, blockdiag
+, nwdiag
+}:
+
+buildPythonPackage rec {
+  pname = "sphinxcontrib-nwdiag";
+  version = "2.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-bula1DutRv6NwfZRhciZfLHRZmXu42p+qvbeExN/+Fk=";
+  };
+
+  propagatedBuildInputs = [ sphinx blockdiag nwdiag ];
+
+  pythonImportsCheck = [ "sphinxcontrib.nwdiag" ];
+
+  meta = with lib; {
+    description = "Sphinx nwdiag extension";
+    homepage = "https://github.com/blockdiag/sphinxcontrib-nwdiag";
+    maintainers = with maintainers; [ davidtwco ];
+    license = licenses.bsd2;
+  };
+}
diff --git a/pkgs/development/python-modules/sphinxcontrib-seqdiag/default.nix b/pkgs/development/python-modules/sphinxcontrib-seqdiag/default.nix
new file mode 100644
index 00000000000..c7407300d31
--- /dev/null
+++ b/pkgs/development/python-modules/sphinxcontrib-seqdiag/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, sphinx
+, blockdiag
+, seqdiag
+}:
+
+buildPythonPackage rec {
+  pname = "sphinxcontrib-seqdiag";
+  version = "2.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-THJ1ra/W2X/lQaDjGbL27VMn0lWPJApwgKMrPhL0JY0=";
+  };
+
+  propagatedBuildInputs = [ sphinx blockdiag seqdiag ];
+
+  pythonImportsCheck = [ "sphinxcontrib.seqdiag" ];
+
+  meta = with lib; {
+    description = "Sphinx seqdiag extension";
+    homepage = "https://github.com/blockdiag/sphinxcontrib-seqdiag";
+    maintainers = with maintainers; [ davidtwco ];
+    license = licenses.bsd2;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 64adafc6207..68ea43b3a84 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7750,6 +7750,8 @@ 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 { };
@@ -7772,6 +7774,8 @@ in {
 
   sphinxcontrib-katex = callPackage ../development/python-modules/sphinxcontrib-katex { };
 
+  sphinxcontrib-nwdiag = callPackage ../development/python-modules/sphinxcontrib-nwdiag { };
+
   sphinxcontrib_newsfeed = callPackage ../development/python-modules/sphinxcontrib_newsfeed { };
 
   sphinxcontrib-openapi = callPackage ../development/python-modules/sphinxcontrib-openapi { };
@@ -7784,6 +7788,8 @@ in {
 
   sphinxcontrib-serializinghtml = callPackage ../development/python-modules/sphinxcontrib-serializinghtml { };
 
+  sphinxcontrib-seqdiag = callPackage ../development/python-modules/sphinxcontrib-seqdiag { };
+
   sphinxcontrib-spelling = callPackage ../development/python-modules/sphinxcontrib-spelling { };
 
   sphinxcontrib-tikz = callPackage ../development/python-modules/sphinxcontrib-tikz {