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/snapcast/default.nix

@@ -0,0 +1,73 @@
+{ stdenv, lib, fetchFromGitHub, cmake, pkg-config
+, alsa-lib, asio, avahi, boost17x, flac, libogg, libvorbis, soxr
+, pulseaudioSupport ? false, libpulseaudio
+, nixosTests }:
+
+assert pulseaudioSupport -> libpulseaudio != null;
+
+let
+
+  dependency = { name, version, sha256 }:
+  stdenv.mkDerivation {
+    name = "${name}-${version}";
+
+    src = fetchFromGitHub {
+      owner = "badaix";
+      repo  = name;
+      rev   = "v${version}";
+      inherit sha256;
+    };
+
+    nativeBuildInputs = [ cmake ];
+  };
+
+  aixlog = dependency {
+    name    = "aixlog";
+    version = "1.5.0";
+    sha256  = "09mnkrans9zmwfxsiwgkm0rba66c11kg5zby9x3rjic34gnmw6ay";
+  };
+
+  popl = dependency {
+    name    = "popl";
+    version = "1.2.0";
+    sha256  = "1z6z7fwffs3d9h56mc2m24d5gp4fc5bi8836zyfb276s6fjyfcai";
+  };
+
+in
+
+stdenv.mkDerivation rec {
+  pname = "snapcast";
+  version = "0.26.0";
+
+  src = fetchFromGitHub {
+    owner  = "badaix";
+    repo   = "snapcast";
+    rev    = "v${version}";
+    sha256 = "sha256-CCifn9OEFM//Hk1PJj8T3MXIV8pXCTdBBXPsHuZwLyQ=";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  # snapcast also supports building against tremor but as we have libogg, that's
+  # not needed
+  buildInputs = [
+    boost17x
+    alsa-lib asio avahi flac libogg libvorbis
+    aixlog popl soxr
+  ] ++ lib.optional pulseaudioSupport libpulseaudio;
+
+  # Upstream systemd unit files are pretty awful, so we provide our own in a
+  # NixOS module. It might make sense to get that upstreamed...
+  postInstall = ''
+    install -d $out/share/doc/snapcast
+    cp -r ../doc/* ../*.md $out/share/doc/snapcast
+  '';
+
+  passthru.tests.snapcast = nixosTests.snapcast;
+
+  meta = with lib; {
+    description = "Synchronous multi-room audio player";
+    homepage = "https://github.com/badaix/snapcast";
+    maintainers = with maintainers; [ fpletz ];
+    license = licenses.gpl3Plus;
+  };
+}