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/misc/screensavers/xlockmore/default.nix

@@ -0,0 +1,42 @@
+{ stdenv, lib, fetchurl, pam ? null, libX11, libXext, libXinerama
+, libXdmcp, libXt, autoreconfHook }:
+
+stdenv.mkDerivation rec {
+  pname = "xlockmore";
+  version = "5.69";
+
+  src = fetchurl {
+    url = "http://sillycycle.com/xlock/xlockmore-${version}.tar.xz";
+    sha256 = "sha256-6pJlTAASJoSHZaJRpzvLxHPM7xe3IcwY1TYfWdvW07k=";
+    curlOpts = "--user-agent 'Mozilla/5.0'";
+  };
+
+  # Optionally, it can use GTK.
+  buildInputs = [ pam libX11 libXext.dev libXinerama libXdmcp libXt ];
+  nativeBuildInputs = [ autoreconfHook ];
+
+  # Don't try to install `xlock' setuid. Password authentication works
+  # fine via PAM without super user privileges.
+  configureFlags =
+    [ "--disable-setuid"
+    ] ++ (lib.optional (pam != null) "--enable-pam");
+
+  postPatch =
+    let makePath = p: lib.concatMapStringsSep " " (x: x + "/" + p) buildInputs;
+        inputs = "${makePath "lib"} ${makePath "include"}";
+    in ''
+      sed -i 's,\(for ac_dir in\),\1 ${inputs},' configure.ac
+      sed -i 's,/usr/,/no-such-dir/,g' configure.ac
+      configureFlags+=" --enable-appdefaultdir=$out/share/X11/app-defaults"
+    '';
+
+  hardeningDisable = [ "format" ]; # no build output otherwise
+
+  meta = with lib; {
+    description = "Screen locker for the X Window System";
+    homepage = "http://sillycycle.com/xlockmore.html";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ pSub ];
+    platforms = platforms.linux;
+  };
+}