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/audio/vkeybd/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchurl, alsa-lib, libX11, makeWrapper, tcl, tk }:
+
+stdenv.mkDerivation  rec {
+  pname = "vkeybd";
+  version = "0.1.18d";
+
+  src = fetchurl {
+    url = "ftp://ftp.suse.com/pub/people/tiwai/vkeybd/${pname}-${version}.tar.bz2";
+    sha256 = "0107b5j1gf7dwp7qb4w2snj4bqiyps53d66qzl2rwj4jfpakws5a";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ alsa-lib libX11 tcl tk ];
+
+  configurePhase = ''
+    mkdir -p $out/bin
+    sed -e "s@/usr/local@$out@" -i Makefile
+  '';
+
+  makeFlags = [ "TKLIB=-l${tk.libPrefix}" "TCLLIB=-l${tcl.libPrefix}" ];
+
+  postInstall = ''
+    wrapProgram $out/bin/vkeybd --set TK_LIBRARY "${tk}/lib/${tk.libPrefix}"
+  '';
+
+  meta = with lib; {
+    description = "Virtual MIDI keyboard";
+    homepage = "https://www.alsa-project.org/~tiwai/alsa.html";
+    license = licenses.gpl2Plus;
+    platforms = platforms.linux;
+    maintainers = [ maintainers.goibhniu ];
+  };
+}