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/news/leafnode/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchurl, pcre }:
+
+stdenv.mkDerivation {
+  pname = "leafnode";
+  version = "2.0.0.alpha20121101a.12";
+
+  src = fetchurl {
+    url = "http://home.pages.de/~mandree/leafnode/beta/leafnode-2.0.0.alpha20121101a.tar.bz2";
+    sha256 = "096w4gxj08m3vwmyv4sxpmbl8dn6mzqfmrhc32jgyca6qzlrdin8";
+  };
+
+  configureFlags = [ "--enable-runas-user=nobody" ];
+
+  prePatch = ''
+    substituteInPlace Makefile.in --replace 02770 0770
+  '';
+
+  preConfigure = ''
+    # configure uses id to check environment; we don't want this check
+    sed -re 's/^ID[=].*/ID="echo whatever"/' -i configure
+  '';
+
+  postConfigure = ''
+      # The is_validfqdn is far too restrictive, and only allows
+      # Internet-facing servers to run.  In order to run leafnode via
+      # localhost only, we need to disable this check.
+      sed -i validatefqdn.c -e 's/int is_validfqdn(const char \*f) {/int is_validfqdn(const char *f) { return 1;/;'
+  '';
+
+  buildInputs = [ pcre];
+
+  meta = {
+    homepage = "http://leafnode.sourceforge.net/";
+    description = "Implementation of a store & forward NNTP proxy";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.unix;
+  };
+}