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/sync/backintime/qt.nix

@@ -0,0 +1,26 @@
+{ mkDerivation, backintime-common, python3 }:
+
+let
+  python' = python3.withPackages (ps: with ps; [ pyqt5 backintime-common ]);
+in
+mkDerivation {
+  inherit (backintime-common)
+    version src installFlags meta dontAddPrefix nativeBuildInputs;
+
+  pname = "backintime-qt";
+
+  buildInputs = [ python' backintime-common ];
+
+  preConfigure = ''
+    cd qt
+    substituteInPlace configure \
+      --replace '"/../etc' '"/etc'
+    substituteInPlace qttools.py \
+      --replace "__file__, os.pardir, os.pardir" '"${backintime-common}/${python'.sitePackages}/backintime"'
+  '';
+
+  preFixup = ''
+    wrapQtApp "$out/bin/backintime-qt" \
+      --prefix PATH : "${backintime-common}/bin:$PATH"
+  '';
+}