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/pplpy/default.nix

@@ -0,0 +1,62 @@
+{ lib
+, fetchPypi
+, buildPythonPackage
+, gmp
+, mpfr
+, libmpc
+, ppl
+, cython
+, cysignals
+, gmpy2
+, sphinx
+}:
+
+buildPythonPackage rec {
+  pname = "pplpy";
+  version = "0.8.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "500bd0f4ae1a76956fae7fcba77854f5ec3e64fce76803664983763c3f2bd8bd";
+  };
+
+  buildInputs = [
+    gmp
+    mpfr
+    libmpc
+    ppl
+  ];
+
+  nativeBuildInputs = [
+    sphinx # docbuild, called by make
+  ];
+
+  propagatedBuildInputs = [
+    cython
+    cysignals
+    gmpy2
+  ];
+
+  outputs = [ "out" "doc" ];
+
+  postBuild = ''
+    # Find the build result in order to put it into PYTHONPATH. The doc
+    # build needs to import pplpy.
+    build_result="$PWD/$( find build/ -type d -name 'lib.*' | head -n1 )"
+
+    echo "Building documentation"
+    PYTHONPATH="$build_result:$PYTHONPATH" make -C docs html
+  '';
+
+  postInstall = ''
+    mkdir -p "$doc/share/doc"
+    mv docs/build/html "$doc/share/doc/pplpy"
+  '';
+
+  meta = with lib; {
+    description = "A Python wrapper for ppl";
+    homepage = "https://gitlab.com/videlec/pplpy";
+    maintainers = teams.sage.members;
+    license = licenses.gpl3;
+  };
+}