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/irker/default.nix

@@ -0,0 +1,44 @@
+{ lib, stdenv, fetchFromGitLab, python3, pkg-config
+, xmlto, docbook2x, docbook_xsl, docbook_xml_dtd_412 }:
+
+stdenv.mkDerivation {
+  pname = "irker";
+  version = "2017-02-12";
+
+  src = fetchFromGitLab {
+    owner = "esr";
+    repo = "irker";
+    rev = "dc0f65a7846a3922338e72d8c6140053fe914b54";
+    sha256 = "1hslwqa0gqsnl3l6hd5hxpn0wlachxd51infifhlwhyhd6iwgx8p";
+  };
+
+  nativeBuildInputs = [ pkg-config xmlto docbook2x docbook_xsl docbook_xml_dtd_412 ];
+
+  buildInputs = [
+    python3
+    # Needed for proxy support I believe, which I haven't tested.
+    # Probably needs to be propagated and some wrapPython magic
+    # python.pkgs.pysocks
+  ];
+
+  strictDeps = true;
+
+  postPatch = ''
+    substituteInPlace Makefile \
+      --replace '-o 0 -g 0' ""
+  '';
+
+  installFlags = [
+    "prefix=/"
+    "DESTDIR=$$out"
+  ];
+
+  meta = with lib; {
+    description = "IRC client that runs as a daemon accepting notification requests";
+    homepage = "https://gitlab.com/esr/irker";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ dtzWill ];
+    mainProgram = "irkerd";
+    platforms = platforms.unix;
+  };
+}