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/blockdiag/default.nix

@@ -0,0 +1,66 @@
+{ lib
+, buildPythonPackage
+, docutils
+, fetchFromGitHub
+, funcparserlib
+, nose
+, pillow
+, ephem
+, pythonOlder
+, pytestCheckHook
+, reportlab
+, setuptools
+, webcolors
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "blockdiag";
+  version = "3.0.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "blockdiag";
+    repo = "blockdiag";
+    rev = version;
+    sha256 = "sha256-j8FoNUIJJOaahaol1MRPyY2jcPCEIlaAD4bmM2QKFFI=";
+  };
+
+  propagatedBuildInputs = [
+    setuptools
+    funcparserlib
+    pillow
+    webcolors
+    reportlab
+    docutils
+  ];
+
+  checkInputs = [
+    ephem
+    nose
+    pytestCheckHook
+  ];
+
+  pytestFlagsArray = [
+    "src/blockdiag/tests/"
+  ];
+
+  disabledTests = [
+    # Test require network access
+    "test_app_cleans_up_images"
+  ];
+
+  pythonImportsCheck = [
+    "blockdiag"
+  ];
+
+  meta = with lib; {
+    description = "Generate block-diagram image from spec-text file (similar to Graphviz)";
+    homepage = "http://blockdiag.com/";
+    license = licenses.asl20;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ bjornfor SuperSandro2000 ];
+  };
+}