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/pyalgotrade/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, matplotlib
+, numpy
+, python-dateutil
+, pytz
+, requests
+, retrying
+, scipy
+, six
+, tornado
+, tweepy
+, ws4py
+}:
+
+buildPythonPackage rec {
+  pname = "pyalgotrade";
+  version = "0.20";
+
+  src = fetchPypi {
+    pname = "PyAlgoTrade";
+    inherit version;
+    sha256 = "7927c87af202869155280a93ff6ee934bb5b46cdb1f20b70f7407337f8541cbd";
+  };
+
+  propagatedBuildInputs = [
+    matplotlib numpy python-dateutil pytz requests
+    retrying scipy six tornado tweepy ws4py
+  ];
+
+  # no tests in PyPI tarball
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Python Algorithmic Trading";
+    homepage = "http://gbeced.github.io/pyalgotrade/";
+    license = licenses.asl20;
+  };
+
+}