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/applications/misc/gcalcli/default.nix

@@ -0,0 +1,37 @@
+{ stdenv, lib, fetchFromGitHub, python3
+, libnotify ? null }:
+
+with python3.pkgs;
+
+buildPythonApplication rec {
+  pname = "gcalcli";
+  version = "4.3.0";
+
+  src = fetchFromGitHub {
+    owner  = "insanum";
+    repo   = pname;
+    rev    = "v${version}";
+    sha256 = "0s5fhcmz3n0dwh3vkqr4aigi59q43v03ch5jhh6v75149icwr0df";
+  };
+
+  postPatch = lib.optionalString stdenv.isLinux ''
+    substituteInPlace gcalcli/argparsers.py \
+      --replace "'notify-send" "'${libnotify}/bin/notify-send"
+  '';
+
+  propagatedBuildInputs = [
+    python-dateutil gflags httplib2 parsedatetime six vobject
+    google-api-python-client oauth2client uritemplate
+    libnotify
+  ];
+
+  # There are no tests as of 4.0.0a4
+  doCheck = false;
+
+  meta = with lib; {
+    description = "CLI for Google Calendar";
+    homepage = "https://github.com/insanum/gcalcli";
+    license = licenses.mit;
+    maintainers = with maintainers; [ nocoolnametom ];
+  };
+}