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/znc/default.nix

@@ -0,0 +1,51 @@
+{ lib, stdenv, fetchurl, openssl, pkg-config
+, withPerl ? false, perl
+, withPython ? false, python3
+, withTcl ? false, tcl
+, withCyrus ? true, cyrus_sasl
+, withUnicode ? true, icu
+, withZlib ? true, zlib
+, withIPv6 ? true
+, withDebug ? false
+}:
+
+with lib;
+
+stdenv.mkDerivation rec {
+  pname = "znc";
+  version = "1.8.2";
+
+  src = fetchurl {
+    url = "https://znc.in/releases/archive/${pname}-${version}.tar.gz";
+    sha256 = "03fyi0j44zcanj1rsdx93hkdskwfvhbywjiwd17f9q1a7yp8l8zz";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ openssl ]
+    ++ optional withPerl perl
+    ++ optional withPython python3
+    ++ optional withTcl tcl
+    ++ optional withCyrus cyrus_sasl
+    ++ optional withUnicode icu
+    ++ optional withZlib zlib;
+
+  configureFlags = [
+    (lib.enableFeature withPerl "perl")
+    (lib.enableFeature withPython "python")
+    (lib.enableFeature withTcl "tcl")
+    (lib.withFeatureAs withTcl "tcl" "${tcl}/lib")
+    (lib.enableFeature withCyrus "cyrus")
+  ] ++ optional (!withIPv6) [ "--disable-ipv6" ]
+    ++ optional withDebug [ "--enable-debug" ];
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    description = "Advanced IRC bouncer";
+    homepage = "https://wiki.znc.in/ZNC";
+    maintainers = with maintainers; [ schneefux lnl7 ];
+    license = licenses.asl20;
+    platforms = platforms.unix;
+  };
+}