uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/python-modules/growattserver/default.nix

@@ -0,0 +1,42 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, requests
+}:
+
+buildPythonPackage rec {
+  pname = "growattserver";
+  version = "1.2.0";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "indykoning";
+    repo = "PyPi_GrowattServer";
+    rev = version;
+    sha256 = "0v9clmz4qg6krmbsbfsrhsan824y2mqvwxsxb0fzfgaszxwkpm30";
+  };
+
+  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" ];
+
+  meta = with lib; {
+    description = "Python package to retrieve information from Growatt units";
+    homepage = "https://github.com/indykoning/PyPi_GrowattServer";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fab ];
+  };
+}