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/networking/p2p/mldonkey/default.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchurl, fetchpatch, ocamlPackages, zlib }:
+
+stdenv.mkDerivation rec {
+  pname = "mldonkey";
+  version = "3.1.7-2";
+
+  src = fetchurl {
+    url = "https://ygrek.org/p/release/mldonkey/mldonkey-${version}.tar.bz2";
+    sha256 = "b926e7aa3de4b4525af73c88f1724d576b4add56ef070f025941dd51cb24a794";
+  };
+
+  patches = [
+    # Fixes C++17 compat
+    (fetchpatch {
+      url = "https://github.com/ygrek/mldonkey/pull/66/commits/20ff84c185396f3d759cf4ef46b9f0bd33a51060.patch";
+      hash = "sha256-MCqx0jVfOaLkZhhv0b1cTdO6BK2/f6TxTWmx+NZjXME=";
+    })
+  ];
+
+  preConfigure = ''
+    substituteInPlace Makefile --replace '+camlp4' \
+      '${ocamlPackages.camlp4}/lib/ocaml/${ocamlPackages.ocaml.version}/site-lib/camlp4'
+  '';
+
+  buildInputs = (with ocamlPackages; [
+    ocaml
+    camlp4
+    num
+  ]) ++ [
+    zlib
+  ];
+
+  meta = {
+    broken = stdenv.isDarwin;
+    description = "Client for many p2p networks, with multiple frontends";
+    homepage = "http://mldonkey.sourceforge.net/";
+    license = lib.licenses.gpl2Only;
+    platforms = lib.platforms.unix;
+  };
+}