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/dns/knot-dns/default.nix

@@ -0,0 +1,69 @@
+{ lib, stdenv, fetchurl, pkg-config, gnutls, liburcu, lmdb, libcap_ng, libidn2, libunistring
+, systemd, nettle, libedit, zlib, libiconv, libintl, libmaxminddb, libbpf, nghttp2, libmnl
+, autoreconfHook, nixosTests, knot-resolver
+}:
+
+stdenv.mkDerivation rec {
+  pname = "knot-dns";
+  version = "3.1.8";
+
+  src = fetchurl {
+    url = "https://secure.nic.cz/files/knot-dns/knot-${version}.tar.xz";
+    sha256 = "767e458a56277a1270b359294c3be6c63fd734884d62a045e01756a46507aa94";
+  };
+
+  outputs = [ "bin" "out" "dev" ];
+
+  configureFlags = [
+    "--with-configdir=/etc/knot"
+    "--with-rundir=/run/knot"
+    "--with-storage=/var/lib/knot"
+  ];
+
+  patches = [
+    # Don't try to create directories like /var/lib/knot at build time.
+    # They are later created from NixOS itself.
+    ./dont-create-run-time-dirs.patch
+    ./runtime-deps.patch
+  ];
+
+  nativeBuildInputs = [ pkg-config autoreconfHook ];
+  buildInputs = [
+    gnutls liburcu libidn2 libunistring
+    nettle libedit
+    libiconv lmdb libintl
+    nghttp2 # DoH support in kdig
+    libmaxminddb # optional for geoip module (it's tiny)
+    # without sphinx &al. for developer documentation
+    # TODO: add dnstap support?
+  ] ++ lib.optionals stdenv.isLinux [
+    libcap_ng systemd
+    libbpf libmnl # XDP support (it's Linux kernel API)
+  ] ++ lib.optional stdenv.isDarwin zlib; # perhaps due to gnutls
+
+  enableParallelBuilding = true;
+
+  CFLAGS = [ "-O2" "-DNDEBUG" ];
+
+  doCheck = true;
+  checkFlags = "V=1"; # verbose output in case some test fails
+  doInstallCheck = true;
+
+  postInstall = ''
+    rm -r "$out"/lib/*.la
+  '';
+
+  passthru.tests = {
+    inherit knot-resolver;
+  } // lib.optionalAttrs stdenv.isLinux {
+    inherit (nixosTests) knot;
+  };
+
+  meta = with lib; {
+    description = "Authoritative-only DNS server from .cz domain registry";
+    homepage = "https://knot-dns.cz";
+    license = licenses.gpl3Plus;
+    platforms = platforms.unix;
+    maintainers = [ maintainers.vcunat ];
+  };
+}