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/ircrobots/default.nix

@@ -0,0 +1,57 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, anyio
+, asyncio-rlock
+, asyncio-throttle
+, dataclasses
+, ircstates
+, async_stagger
+, async-timeout
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "ircrobots";
+  version = "0.4.6";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "jesopo";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-+BrS1+ZkgwT/qvqD0PwRZi2LF+31biS738SzKH1dy7w=";
+  };
+
+  postPatch = ''
+    # too specific pins https://github.com/jesopo/ircrobots/issues/3
+    sed -iE 's/anyio.*/anyio/' requirements.txt
+    sed -iE 's/ircstates.*/ircstates/' requirements.txt
+    sed -iE 's/async_timeout.*/async_timeout/' requirements.txt
+  '';
+
+  propagatedBuildInputs = [
+    anyio
+    asyncio-rlock
+    asyncio-throttle
+    ircstates
+    async_stagger
+    async-timeout
+  ] ++ lib.optionals (pythonOlder "3.7") [
+    dataclasses
+  ];
+
+  checkPhase = ''
+    ${python.interpreter} -m unittest test
+  '';
+
+  pythonImportsCheck = [ "ircrobots" ];
+
+  meta = with lib; {
+    description = "Asynchronous bare-bones IRC bot framework for python3";
+    license = licenses.mit;
+    homepage = "https://github.com/jesopo/ircrobots";
+    maintainers = with maintainers; [ hexa ];
+  };
+}