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/servers/shairplay/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config
+, avahi, libao }:
+
+stdenv.mkDerivation rec {
+  pname = "shairplay-unstable";
+  version = "2018-08-24";
+
+  src = fetchFromGitHub {
+    owner  = "juhovh";
+    repo   = "shairplay";
+    rev    = "096b61ad14c90169f438e690d096e3fcf87e504e";
+    sha256 = "02xkd9al79pbqh8rhzz5w99vv43jg5vqkqg7kxsw8c8sz9di9wsa";
+  };
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+
+  buildInputs = [ avahi libao ];
+
+  enableParallelBuilding = true;
+
+  # the build will fail without complaining about a reference to /tmp
+  preFixup = lib.optionalString stdenv.isLinux ''
+    patchelf \
+      --set-rpath "${lib.makeLibraryPath buildInputs}:$out/lib" \
+      $out/bin/shairplay
+  '';
+
+  meta = with lib; {
+    inherit (src.meta) homepage;
+    description = "Apple AirPlay and RAOP protocol server";
+    license     = licenses.mit;
+    maintainers = with maintainers; [ peterhoeg ];
+    platforms   = platforms.unix;
+  };
+}