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/diagrams/build_poetry.patch

@@ -0,0 +1,12 @@
+diff --git a/pyproject.toml b/pyproject.toml
+index 2c93a39..6c800e2 100644
+--- a/pyproject.toml
++++ b/pyproject.toml
+@@ -24,3 +24,7 @@ isort = "^4.3"
+ 
+ [tool.black]
+ line-length = 120
++
++[build-system]
++requires = ["poetry_core>=1.0.0"]
++build-backend = "poetry.core.masonry.api"

pkgs/development/python-modules/diagrams/default.nix

@@ -0,0 +1,59 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, black
+, jinja2
+, poetry-core
+, round
+, graphviz
+, inkscape
+, imagemagick
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "diagrams";
+  version = "0.21.1";
+  format = "pyproject";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "mingrammer";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-YoXV5ikkBCSVyGmzEqp+7JLy82d7z9sbwS+U/EN3BFk=";
+  };
+
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace 'graphviz = ">=0.13.2,<0.20.0"' 'graphviz = "*"'
+  '';
+
+  preConfigure = ''
+    patchShebangs autogen.sh
+    ./autogen.sh
+  '';
+
+  patches = [
+    # The build-system section is missing
+    ./build_poetry.patch
+  ];
+
+  checkInputs = [ pytestCheckHook ];
+
+  # Despite living in 'tool.poetry.dependencies',
+  # these are only used at build time to process the image resource files
+  nativeBuildInputs = [ black inkscape imagemagick jinja2 poetry-core round ];
+
+  propagatedBuildInputs = [ graphviz ];
+
+  pythonImportsCheck = [ "diagrams" ];
+
+  meta = with lib; {
+    description = "Diagram as Code";
+    homepage    = "https://diagrams.mingrammer.com/";
+    license     = licenses.mit;
+    maintainers =  with maintainers; [ addict3d ];
+  };
+}