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/pydyf/default.nix

@@ -0,0 +1,50 @@
+{ lib
+, buildPythonPackage
+, fetchpatch
+, fetchPypi
+, isPy3k
+, pytestCheckHook
+, coverage
+, ghostscript
+, pillow
+}:
+
+buildPythonPackage rec {
+  pname = "pydyf";
+  version = "0.1.2";
+  disabled = !isPy3k;
+
+  src = fetchPypi {
+    inherit version;
+    pname = "pydyf";
+    sha256 = "sha256-Hi9d5IF09QXeAlp9HnzwG73ZQiyoq5RReCvwDuF4YCw=";
+  };
+
+  patches = [
+    # Fix tests for Ghostscript 9.56
+    # Remove after v0.1.3 has been released
+    (fetchpatch {
+      url = "https://github.com/CourtBouillon/pydyf/commit/d4c34823f1d15368753c9c26f7acc7a24fc2d979.patch";
+      sha256 = "sha256-2hHZW/q5CbStbpSJYbm3b23qKXANEb5jbPGQ83uHC+Q=";
+    })
+  ];
+
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace "--isort --flake8 --cov --no-cov-on-fail" ""
+  '';
+
+  checkInputs = [
+    pytestCheckHook
+    coverage
+    ghostscript
+    pillow
+  ];
+
+  meta = with lib; {
+    homepage = "https://doc.courtbouillon.org/pydyf/stable/";
+    description = "Low-level PDF generator written in Python and based on PDF specification 1.7";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ rprecenth ];
+  };
+}