diff --git a/pkgs/development/python-modules/gaphas/default.nix b/pkgs/development/python-modules/gaphas/default.nix
new file mode 100644
index 000000000000..a6351aeeadd7
--- /dev/null
+++ b/pkgs/development/python-modules/gaphas/default.nix
@@ -0,0 +1,45 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchPypi
+, poetry-core
+, gobject-introspection
+, gtk3
+, pycairo
+, pygobject3
+, typing-extensions
+}:
+
+buildPythonPackage rec {
+  pname = "gaphas";
+  version = "3.1.9";
+  disabled = pythonOlder "3.7";
+
+  format = "pyproject";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-S6cRsfqXYM4mSVSs2M8fET5ShFClKkGkod2w2y6F2gc=";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  buildInputs = [ gobject-introspection gtk3 ];
+
+  propagatedBuildInputs = [
+    pycairo
+    pygobject3
+    typing-extensions
+  ];
+
+  pythonImportsCheck = [ "gaphas" ];
+
+  meta = with lib; {
+    description = "GTK+ based diagramming widget";
+    maintainers = with maintainers; [ wolfangaukang ];
+    homepage = "https://github.com/gaphor/gaphas";
+    license = licenses.asl20;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b15459dec7e8..18c4d6628050 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2920,6 +2920,8 @@ in {
     pythonPackages = self;
   });
 
+  gaphas = callPackage ../development/python-modules/gaphas { };
+
   garminconnect-aio = callPackage ../development/python-modules/garminconnect-aio { };
 
   garminconnect-ha = callPackage ../development/python-modules/garminconnect-ha { };