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/misc/p2pool/default.nix

@@ -0,0 +1,50 @@
+{ stdenv
+, cmake
+, fetchFromGitHub
+, gss
+, hwloc
+, lib
+, libsodium
+, libuv
+, nix-update-script
+, openssl
+, pkg-config
+, zeromq
+}:
+
+stdenv.mkDerivation rec {
+  pname = "p2pool";
+  version = "2.1";
+
+  src = fetchFromGitHub {
+    owner = "SChernykh";
+    repo = "p2pool";
+    rev = "v${version}";
+    sha256 = "sha256-cpBMzYLcU93GXYkBhUdoRovjQ2hd1+pAt6d9aAOaZT8=";
+    fetchSubmodules = true;
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ libuv zeromq libsodium gss hwloc openssl ];
+
+  installPhase = ''
+    runHook preInstall
+
+    install -vD p2pool $out/bin/p2pool
+
+    runHook postInstall
+  '';
+
+  passthru = {
+    updateScript = nix-update-script {
+      attrPath = pname;
+    };
+  };
+
+  meta = with lib; {
+    description = "Decentralized pool for Monero mining";
+    homepage = "https://github.com/SChernykh/p2pool";
+    license = licenses.gpl3Only;
+    maintainers = with maintainers; [ ratsclub ];
+  };
+}