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/clvm-tools/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, clvm
+, setuptools-scm
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "clvm_tools";
+  version = "0.4.3";
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "Chia-Network";
+    repo = "clvm_tools";
+    rev = version;
+    sha256 = "sha256-bWz3YCrakob/kROq+LOA+yD1wtIbInVrmDqtg4/cV4g=";
+  };
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    clvm
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "clvm_tools"
+  ];
+
+  disabledTests = [
+    "test_cmd_unknown-1_txt"
+  ];
+
+  # give a hint to setuptools-scm on package version
+  SETUPTOOLS_SCM_PRETEND_VERSION="v${version}";
+
+  meta = with lib; {
+    description = "Tools for clvm development";
+    homepage = "https://www.chialisp.com/";
+    license = licenses.asl20;
+    maintainers = teams.chia.members;
+  };
+}