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/igraph/default.nix

@@ -0,0 +1,55 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, pkg-config
+, igraph
+, texttable
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "igraph";
+  version = "0.9.10";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "igraph";
+    repo = "python-igraph";
+    rev = version;
+    hash = "sha256-c20N8BtbQGxAK7ykQvyfqWYu7wVOlYfeGpNOwWPlGxs=";
+  };
+
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
+  buildInputs = [
+    igraph
+    igraph.dev
+  ];
+
+  propagatedBuildInputs = [
+    texttable
+  ];
+
+  # NB: We want to use our igraph, not vendored igraph, but even with
+  # pkg-config on the PATH, their custom setup.py still needs to be explicitly
+  # told to do it. ~ C.
+  setupPyGlobalFlags = [ "--use-pkg-config" ];
+
+  checkPhase = ''
+    ${python.interpreter} -m unittest
+  '';
+
+  pythonImportsCheck = [ "igraph" ];
+
+  meta = with lib; {
+    description = "High performance graph data structures and algorithms";
+    homepage = "https://igraph.org/python/";
+    changelog = "https://github.com/igraph/python-igraph/blob/${src.rev}/CHANGELOG.md";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ MostAwesomeDude dotlambda ];
+  };
+}