diff --git a/pkgs/development/python-modules/growattserver/default.nix b/pkgs/development/python-modules/growattserver/default.nix
index 6347d9f55b8e..a10b1d709a2e 100644
--- a/pkgs/development/python-modules/growattserver/default.nix
+++ b/pkgs/development/python-modules/growattserver/default.nix
@@ -7,31 +7,28 @@
 
 buildPythonPackage rec {
   pname = "growattserver";
-  version = "1.2.0";
-  disabled = pythonOlder "3.6";
+  version = "1.2.2";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "indykoning";
     repo = "PyPi_GrowattServer";
     rev = version;
-    sha256 = "0v9clmz4qg6krmbsbfsrhsan824y2mqvwxsxb0fzfgaszxwkpm30";
+    hash = "sha256-dS5Ng89aYzfegdFlyt1eo7vhva2ME77pQV2hkd/iNq8=";
   };
 
   propagatedBuildInputs = [
     requests
   ];
 
-  postPatch = ''
-    # https://github.com/indykoning/PyPi_GrowattServer/issues/2
-    substituteInPlace setup.py \
-      --replace "tag = os.environ['LATEST_TAG']" "" \
-      --replace "version=tag," 'version="${version}",'
-  '';
-
   # Project has no tests
   doCheck = false;
 
-  pythonImportsCheck = [ "growattServer" ];
+  pythonImportsCheck = [
+    "growattServer"
+  ];
 
   meta = with lib; {
     description = "Python package to retrieve information from Growatt units";