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/whoosh/default.nix

@@ -0,0 +1,30 @@
+{ lib, buildPythonPackage, fetchPypi, pytest }:
+
+buildPythonPackage rec {
+  pname = "Whoosh";
+  version = "2.7.4";
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "10qsqdjpbc85fykc1vgcs8xwbgn4l2l52c8d83xf1q59pwyn79bw";
+  };
+
+  checkInputs = [ pytest ];
+
+  # Wrong encoding
+  postPatch = ''
+    rm tests/test_reading.py
+    substituteInPlace setup.cfg --replace "[pytest]" "[tool:pytest]"
+  '';
+  checkPhase =  ''
+    # FIXME: test_minimize_dfa fails on python 3.6
+    py.test -k "not test_timelimit and not test_minimize_dfa"
+  '';
+
+  meta = with lib; {
+    description = "Fast, pure-Python full text indexing, search, and spell
+checking library.";
+    homepage    = "https://bitbucket.org/mchaput/whoosh";
+    license     = licenses.bsd2;
+    maintainers = with maintainers; [ ];
+  };
+}