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/tinycss/default.nix

@@ -0,0 +1,47 @@
+{ pkgs
+, buildPythonPackage
+, fetchPypi
+, pytest
+, python
+, cython
+, cssutils
+, isPyPy
+}:
+
+buildPythonPackage rec {
+  pname = "tinycss";
+  version = "0.4";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "12306fb50e5e9e7eaeef84b802ed877488ba80e35c672867f548c0924a76716e";
+  };
+
+  checkInputs = [ pytest ];
+  propagatedBuildInputs = [ cssutils ];
+  nativeBuildInputs = [
+    cython
+  ];
+
+  preBuild = ''
+    # Force cython to re-generate this file. If it is present, cython will
+    # think it is "up to date" even though it was generated with an older,
+    # incompatible version of cython. See
+    # https://github.com/Kozea/tinycss/issues/17.
+    rm tinycss/speedups.c
+  '';
+
+  checkPhase = ''
+    py.test $out/${python.sitePackages}
+  '';
+
+  # Disable Cython tests for PyPy
+  TINYCSS_SKIP_SPEEDUPS_TESTS = pkgs.lib.optional isPyPy true;
+
+  meta = with pkgs.lib; {
+    description = "Complete yet simple CSS parser for Python";
+    license = licenses.bsd3;
+    homepage = "https://pythonhosted.org/tinycss/";
+    maintainers = [ maintainers.costrouc ];
+  };
+}