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/pycmarkgfm/default.nix

@@ -0,0 +1,34 @@
+{ lib, buildPythonPackage, fetchPypi, isPy27, cffi, pytest }:
+
+buildPythonPackage rec {
+  pname = "pycmarkgfm";
+  version = "1.1.0";
+  disabled = isPy27;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "694cb242f4961437c30b5b015dfbce9d1a1fa48305c2e39f902ce7c65b4cbe0e";
+  };
+
+  propagatedNativeBuildInputs = [ cffi ];
+
+  propagatedBuildInputs = [ cffi ];
+
+  # I would gladly use pytestCheckHook, but pycmarkgfm relies on a native
+  # extension (cmark.so, built through setup.py), and pytestCheckHook runs
+  # pytest in an environment that does not contain this extension, which fails.
+  # cmarkgfm has virtually the same build setup as this package, and uses the
+  # same trick: pkgs/development/python-modules/cmarkgfm/default.nix
+  checkInputs = [ pytest ];
+  checkPhase = ''
+    pytest
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/zopieux/pycmarkgfm";
+    description = "Bindings to GitHub's Flavored Markdown (cmark-gfm), with enhanced support for task lists";
+    platforms = platforms.linux ++ platforms.darwin;
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ zopieux ];
+  };
+}