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/bibtexparser/default.nix

@@ -0,0 +1,49 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, future
+, pyparsing
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "bibtexparser";
+  version = "1.2.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "sciunto-org";
+    repo = "python-${pname}";
+    rev = "v${version}";
+    hash = "sha256-M9fDI28Yq0uUHPx51wiuRPmRTLkjVqj7ixapbSftnJc=";
+  };
+
+  propagatedBuildInputs = [
+    future
+    pyparsing
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    # https://github.com/sciunto-org/python-bibtexparser/pull/259
+    substituteInPlace bibtexparser/tests/test_crossref_resolving.py \
+      --replace "import unittest2 as unittest" "import unittest"
+  '';
+
+  pythonImportsCheck = [
+    "bibtexparser"
+  ];
+
+  meta = with lib; {
+    description = "Bibtex parser for Python";
+    homepage = "https://github.com/sciunto-org/python-bibtexparser";
+    license = with licenses; [ lgpl3Only /* or */ bsd3 ];
+    maintainers = with maintainers; [ fridh ];
+  };
+}