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/semver/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "semver";
+  version = "2.13.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "python-semver";
+    repo = "python-semver";
+    rev = version;
+    hash = "sha256-IWTo/P9JRxBQlhtcH3JMJZZrwAA8EALF4dtHajWUc4w=";
+  };
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    sed -i "/--cov/d" setup.cfg
+    sed -i "/--no-cov-on-fail/d" setup.cfg
+  '';
+
+  preCheck = ''
+    # Confuses source vs dist imports in pytest
+    rm -r dist
+  '';
+
+  disabledTestPaths = [
+    # Don't test the documentation
+    "docs/*.rst"
+  ];
+
+  pythonImportsCheck = [
+    "semver"
+  ];
+
+  meta = with lib; {
+    description = "Python package to work with Semantic Versioning (http://semver.org/)";
+    homepage = "https://python-semver.readthedocs.io/";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ np ];
+  };
+}