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/pylti/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, httplib2
+, oauth
+, oauth2
+, semantic-version
+, flask
+, httpretty
+, oauthlib
+, pyflakes
+, pytest
+, pytestcache
+, pytest-cov
+, covCore
+, pytest-flakes
+, sphinx
+, mock
+, chalice
+, isPy27
+}:
+
+buildPythonPackage rec {
+  pname = "PyLTI";
+  version = "0.7.0";
+
+  disabled = !isPy27;
+
+  # There is no need to fix mock. https://github.com/mitodl/pylti/pull/48
+  postPatch = ''
+    substituteInPlace setup.py --replace "mock==1.0.1" "mock"
+  '';
+
+  propagatedBuildInputs = [ httplib2 oauth oauth2 semantic-version ];
+  checkInputs = [
+    flask httpretty oauthlib pyflakes pytest pytestcache pytest-cov covCore
+    pytest-flakes sphinx mock chalice
+  ];
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "80938a235b1ab390f6889a95237d087ea7adde5cc50fcae9c80c49898e8ee78e";
+  };
+
+  meta = {
+    description = "Implementation of IMS LTI interface that works with edX";
+    homepage = "https://github.com/mitodl/pylti";
+    license = lib.licenses.bsdOriginal;
+    maintainers = with lib.maintainers; [ layus ];
+  };
+}