diff --git a/pkgs/development/python-modules/greencell-client/default.nix b/pkgs/development/python-modules/greencell-client/default.nix
new file mode 100644
index 000000000000..0edf06e1da85
--- /dev/null
+++ b/pkgs/development/python-modules/greencell-client/default.nix
@@ -0,0 +1,38 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  setuptools-scm,
+  pytestCheckHook,
+}:
+
+buildPythonPackage (finalAttrs: {
+  pname = "greencell-client";
+  version = "1.0.3";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "csg-sa";
+    repo = "greencell-client";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-yj2vyAWv1wPsEUZEEc2fUfTLid6xfhZvHZebkIMA778=";
+  };
+
+  build-system = [
+    setuptools
+    setuptools-scm
+  ];
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  pythonImportsCheck = [ "greencell_client" ];
+
+  meta = {
+    description = "Library for communication with Greencell devices used by the Home Assistant integration";
+    homepage = "https://github.com/csg-sa/greencell-client";
+    changelog = "https://github.com/csg-sa/greencell-client/releases/tag/${finalAttrs.src.tag}";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.jamiemagee ];
+  };
+})
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index e3604c024a57..c12b3bf04385 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7169,6 +7169,8 @@ self: super: with self; {
 
   greenback = callPackage ../development/python-modules/greenback { };
 
+  greencell-client = callPackage ../development/python-modules/greencell-client { };
+
   greeneye-monitor = callPackage ../development/python-modules/greeneye-monitor { };
 
   # built-in for pypi