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/tools/misc/markdown-anki-decks/default.nix

@@ -0,0 +1,48 @@
+{ lib
+, python3
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "markdown-anki-decks";
+  version = "1.0.0";
+
+  format = "pyproject";
+
+  src = python3.pkgs.fetchPypi {
+    inherit pname version;
+    sha256 = "R6T8KOHMb1Neg/RG5JQl9+7LxOkAoZL0L5wvVaqm9O0=";
+  };
+
+  nativeBuildInputs = with python3.pkgs; [
+    poetry-core
+  ];
+
+  propagatedBuildInputs = with python3.pkgs; [
+    genanki
+    typer
+    colorama
+    shellingham
+    beautifulsoup4
+    markdown
+    python-frontmatter
+  ];
+
+  postPatch = ''
+    # No API changes.
+    substituteInPlace pyproject.toml \
+      --replace 'python-frontmatter = "^0.5.0"' 'python-frontmatter = "^1.0.0"' \
+      --replace 'genanki = "^0.10.1"' 'genanki = "*"' \
+      --replace 'typer = "^0.3.2"' 'typer = "^0.4.0"'
+  '';
+
+  # No tests available on Pypi and there is only a failing version assertion test in the repo.
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Simple program to convert markdown files into anki decks";
+    maintainers = with maintainers; [ jtojnar ];
+    homepage = "https://github.com/lukesmurray/markdown-anki-decks";
+    license = licenses.mit;
+    platforms = platforms.unix;
+  };
+}