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/strictyaml/default.nix

@@ -0,0 +1,37 @@
+{ buildPythonPackage
+, lib
+, fetchPypi
+, isPy27
+, ruamel-yaml
+, python-dateutil
+}:
+
+buildPythonPackage rec {
+  version = "1.6.1";
+  pname = "strictyaml";
+  disabled = isPy27;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "688be16ee5d1a2f94aa4abdc6d881e8e254d173d724ac88725955fe66bdb63d4";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "ruamel.yaml==0.17.4" "ruamel.yaml"
+  '';
+
+  propagatedBuildInputs = [ ruamel-yaml python-dateutil ];
+
+  # Library tested with external tool
+  # https://hitchdev.com/approach/contributing-to-hitch-libraries/
+  doCheck = false;
+  pythonImportsCheck = [ "strictyaml" ];
+
+  meta = with lib; {
+    description = "Strict, typed YAML parser";
+    homepage = "https://hitchdev.com/strictyaml/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ jonringer ];
+  };
+}