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/dulwich/default.nix

@@ -0,0 +1,67 @@
+{ lib
+, stdenv
+, buildPythonPackage
+, certifi
+, fastimport
+, fetchPypi
+, gevent
+, geventhttpclient
+, git
+, glibcLocales
+, gpgme
+, mock
+, pkgs
+, urllib3
+, paramiko
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  version = "0.20.42";
+  pname = "dulwich";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-cro7YK5qVU0TMrO0CjRf6+FuxGnPYBS7RDtxmQLjPvA=";
+  };
+
+  LC_ALL = "en_US.UTF-8";
+
+  propagatedBuildInputs = [
+    certifi
+    urllib3
+  ];
+
+  checkInputs = [
+    fastimport
+    gevent
+    geventhttpclient
+    git
+    glibcLocales
+    gpgme
+    pkgs.gnupg
+    mock
+    paramiko
+  ];
+
+  doCheck = !stdenv.isDarwin;
+
+  pythonImportsCheck = [
+    "dulwich"
+  ];
+
+  meta = with lib; {
+    description = "Simple Python implementation of the Git file formats and protocols";
+    longDescription = ''
+      Dulwich is a Python implementation of the Git file formats and protocols, which
+      does not depend on Git itself. All functionality is available in pure Python.
+    '';
+    homepage = "https://www.dulwich.io/";
+    changelog = "https://github.com/dulwich/dulwich/blob/dulwich-${version}/NEWS";
+    license = with licenses; [ asl20 gpl2Plus ];
+    maintainers = with maintainers; [ koral ];
+  };
+}