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/python-hglib/default.nix

@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, mercurial
+, nose
+}:
+
+buildPythonPackage rec {
+  pname = "python-hglib";
+  version = "2.6.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-sYvR7VPJDuV9VxTWata7crZOkw1K7KmDCJLAi7KNpgg=";
+  };
+
+  checkInputs = [ mercurial nose ];
+
+  preCheck = ''
+    export HGTMP=$(mktemp -d)
+    export HGUSER=test
+  '';
+
+  pythonImportsCheck = [ "hglib" ];
+
+  meta = with lib; {
+    description = "Library with a fast, convenient interface to Mercurial. It uses Mercurial’s command server for communication with hg.";
+    homepage = "https://www.mercurial-scm.org/wiki/PythonHglibs";
+    license = licenses.mit;
+    maintainers = [ maintainers.kvark ];
+  };
+}