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/tools/networking/openntpd/default.nix

@@ -0,0 +1,42 @@
+{ lib, stdenv, fetchurl, libressl
+, privsepPath ? "/var/empty"
+, privsepUser ? "ntp"
+}:
+
+stdenv.mkDerivation rec {
+  pname = "openntpd";
+  version = "6.8p1";
+
+  src = fetchurl {
+    url = "mirror://openbsd/OpenNTPD/${pname}-${version}.tar.gz";
+    sha256 = "0ijsylc7a4jlpxsqa0jq1w1c7333id8pcakzl7a5749ria1xp0l5";
+  };
+
+  postPatch = ''
+    sed -i '20i#include <sys/cdefs.h>' src/ntpd.h
+    sed -i '19i#include <sys/cdefs.h>' src/log.c
+  '';
+
+  configureFlags = [
+    "--with-privsep-path=${privsepPath}"
+    "--with-privsep-user=${privsepUser}"
+    "--sysconfdir=/etc"
+    "--localstatedir=/var"
+    "--with-cacert=/etc/ssl/certs/ca-certificates.crt"
+  ];
+
+  buildInputs = [ libressl ];
+
+  installFlags = [
+    "sysconfdir=\${out}/etc"
+    "localstatedir=\${TMPDIR}"
+  ];
+
+  meta = with lib; {
+    homepage = "https://www.openntpd.org/";
+    license = licenses.bsd3;
+    description = "OpenBSD NTP daemon (Debian port)";
+    platforms = platforms.all;
+    maintainers = with maintainers; [ thoughtpolice ];
+  };
+}