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/tools/networking/carddav-util/default.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv, fetchFromGitHub, python3Packages, makeWrapper }:
+
+stdenv.mkDerivation {
+  pname = "carddav";
+  version = "0.1-2014-02-26";
+
+  src = fetchFromGitHub {
+    owner = "ljanyst";
+    repo = "carddav-util";
+    rev = "53b181faff5f154bcd180467dd04c0ce69405564";
+    sha256 = "sha256-9iRCNDC0FJ+JD2Hk5TC0w4QMjJ9mMtct5WIA35xTGTg=";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  propagatedBuildInputs = with python3Packages; [ requests vobject lxml ];
+
+  strictDeps = true;
+
+  doCheck = false; # no test
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp $src/carddav-util.py $out/bin
+
+    pythondir="$out/lib/${python3Packages.python.sitePackages}"
+    mkdir -p "$pythondir"
+    cp $src/carddav.py "$pythondir"
+  '';
+
+  preFixup = ''
+    wrapProgram "$out/bin/carddav-util.py" \
+      --prefix PYTHONPATH : "$PYTHONPATH:$(toPythonPath $out)" \
+      --prefix PATH : "$prefix/bin:$PATH"
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/ljanyst/carddav-util";
+    description = "A CardDAV import/export utility";
+    platforms = platforms.unix;
+    license = licenses.isc;
+  };
+}