diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 5294d2e0e4ec..ae010b3dafb7 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -14875,6 +14875,16 @@
     githubId = 4805746;
     name = "Sebastian Jordan";
   };
+  septem9er = {
+  name = "Septem9er";
+  email = "develop@septem9er.de";
+  matrix = "@septem9er:fairydust.space";
+  github = "septem9er";
+  githubId = 33379902;
+  keys = [{
+    fingerprint = "C408 07F9 8677 3D98 EFF3 0980 355A 9AFB FD8E AD33";
+  }];
+};
   seqizz = {
     email = "seqizz@gmail.com";
     github = "seqizz";
diff --git a/pkgs/development/python-modules/altgraph/default.nix b/pkgs/development/python-modules/altgraph/default.nix
new file mode 100644
index 000000000000..0f2321c81e51
--- /dev/null
+++ b/pkgs/development/python-modules/altgraph/default.nix
@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "altgraph";
+  version = "0.17.3";
+
+  format = "setuptools";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "ad33358114df7c9416cdb8fa1eaa5852166c505118717021c6a8c7c7abbd03dd";
+  };
+
+  pythonImportsCheck = [ "altgraph" ];
+
+  meta = with lib; {
+    changelog = "https://github.com/ronaldoussoren/altgraph/tags${version}";
+    description = "A fork of graphlib: a graph (network) package for constructing graphs";
+    longDescription = ''
+      altgraph is a fork of graphlib: a graph (network) package for constructing graphs,
+      BFS and DFS traversals, topological sort, shortest paths, etc. with graphviz output.
+      altgraph includes some additional usage of Python 2.6+ features and enhancements related to modulegraph and macholib.
+    '';
+    homepage = "https://altgraph.readthedocs.io/";
+    downloadPage = "https://pypi.org/project/altgraph/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ septem9er ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 98c7804a6799..e418098be41f 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -442,6 +442,8 @@ self: super: with self; {
 
   altair = callPackage ../development/python-modules/altair { };
 
+  altgraph = callPackage ../development/python-modules/altgraph { };
+
   amarna = callPackage ../development/python-modules/amarna { };
 
   amazon-ion = callPackage ../development/python-modules/amazon-ion { };