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/gopher/sacc/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchurl, ncurses, libressl
+, patches ? [] # allow users to easily override config.def.h
+}:
+
+stdenv.mkDerivation rec {
+  pname = "sacc";
+  version = "1.05";
+
+  src = fetchurl {
+    url = "ftp://bitreich.org/releases/sacc/sacc-${version}.tar.gz";
+    sha512 = "080vpacipdis396lrw3fxc1z7h2d0njm2zi63kvlk0n2m1disv97c968zx8dp76kfw1s03nvvr6v3vnpfkkywiz1idjc92s5rgcbsk1";
+  };
+
+  inherit patches;
+
+  buildInputs = [ ncurses libressl ];
+
+  CFLAGS = lib.optionals stdenv.isDarwin [
+    "-D_DARWIN_C_SOURCE"
+  ];
+
+  postPatch = ''
+    substituteInPlace config.mk \
+      --replace curses ncurses \
+      --replace "/usr/local" "$out"
+    '';
+
+  meta = with lib; {
+    description = "A terminal gopher client";
+    homepage = "gopher://bitreich.org/1/scm/sacc";
+    license = licenses.isc;
+    maintainers = [ maintainers.sternenseemann ];
+    platforms = platforms.unix;
+  };
+}