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/networking/p2p/qbittorrent/default.nix

@@ -0,0 +1,53 @@
+{ mkDerivation, lib, fetchFromGitHub, pkg-config
+, boost, libtorrent-rasterbar, qtbase, qttools, qtsvg
+, debugSupport ? false
+, guiSupport ? true, dbus ? null # GUI (disable to run headless)
+, webuiSupport ? true # WebUI
+, trackerSearch ? true, python3 ? null
+}:
+
+assert guiSupport -> (dbus != null);
+assert trackerSearch -> (python3 != null);
+
+with lib;
+mkDerivation rec {
+  pname = "qbittorrent";
+  version = "4.4.3";
+
+  src = fetchFromGitHub {
+    owner = "qbittorrent";
+    repo = "qBittorrent";
+    rev = "release-${version}";
+    sha256 = "sha256-Gcjs7Yueuw76/4is4ZyvlVr6xZ8D+So1+PjZGg6Curk=";
+  };
+
+  enableParallelBuilding = true;
+
+  # NOTE: 2018-05-31: CMake is working but it is not officially supported
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ boost libtorrent-rasterbar qtbase qttools qtsvg ]
+    ++ optional guiSupport dbus # D(esktop)-Bus depends on GUI support
+    ++ optional trackerSearch python3;
+
+  # Otherwise qm_gen.pri assumes lrelease-qt5, which does not exist.
+  QMAKE_LRELEASE = "lrelease";
+
+  configureFlags = [
+    "--with-boost-libdir=${boost.out}/lib"
+    "--with-boost=${boost.dev}" ]
+    ++ optionals (!guiSupport) [ "--disable-gui" "--enable-systemd" ] # Also place qbittorrent-nox systemd service files
+    ++ optional (!webuiSupport) "--disable-webui"
+    ++ optional debugSupport "--enable-debug";
+
+  qtWrapperArgs = optional trackerSearch "--prefix PATH : ${makeBinPath [ python3 ]}";
+
+  meta = {
+    description = "Featureful free software BitTorrent client";
+    homepage    = "https://www.qbittorrent.org/";
+    changelog   = "https://github.com/qbittorrent/qBittorrent/blob/release-${version}/Changelog";
+    license     = licenses.gpl2Plus;
+    platforms   = platforms.linux;
+    maintainers = with maintainers; [ Anton-Latukha ];
+  };
+}