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/pylink-square/default.nix

@@ -0,0 +1,50 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, fetchFromGitHub
+, mock
+, psutil
+, six
+, future
+}:
+
+let
+  mock' = mock.overridePythonAttrs (old: rec {
+    version = "2.0.0";
+    src = fetchPypi {
+      inherit (old) pname;
+      inherit version;
+      sha256 = "1flbpksir5sqrvq2z0dp8sl4bzbadg21sj4d42w3klpdfvgvcn5i";
+    };
+  });
+in buildPythonPackage rec {
+  pname = "pylink-square";
+  version = "0.8.1";
+
+  src = fetchFromGitHub {
+    owner = "square";
+    repo = "pylink";
+    rev = "v${version}";
+    sha256 = "1q5sm1017pcqcgwhsliiiv1wh609lrjdlc8f5ihlschk1d0qidpd";
+  };
+
+  buildInputs = [ mock' ];
+  propagatedBuildInputs = [ psutil six future ];
+
+  preCheck = ''
+    # For an unknown reason, `pylink --version` output is different
+    # inside the nix build environment across different python versions
+    substituteInPlace tests/unit/test_main.py --replace \
+      "expected = 'pylink %s' % pylink.__version__" \
+      "return"
+  '';
+
+  pythonImportsCheck = [ "pylink" ];
+
+  meta = with lib; {
+    description = "Python interface for the SEGGER J-Link";
+    homepage = "https://github.com/Square/pylink";
+    maintainers = with maintainers; [ dump_stack ];
+    license = licenses.asl20;
+  };
+}