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/p2p/gnunet/default.nix

@@ -0,0 +1,74 @@
+{ lib, stdenv, fetchurl, adns, curl, gettext, gmp, gnutls, libextractor
+, libgcrypt, libgnurl, libidn, libmicrohttpd, libtool, libunistring
+, makeWrapper, ncurses, pkg-config, libxml2, sqlite, zlib
+, libpulseaudio, libopus, libogg, jansson, libsodium
+
+, postgresqlSupport ? false, postgresql }:
+
+stdenv.mkDerivation rec {
+  pname = "gnunet";
+  version = "0.16.3";
+
+  src = fetchurl {
+    url = "mirror://gnu/gnunet/${pname}-${version}.tar.gz";
+    sha256 = "sha256-MjkFLxNTepqrqqZuxCh12+4vaDjF8Ys674VOa1Mew4o=";
+  };
+
+  enableParallelBuilding = true;
+
+  nativeBuildInputs = [ pkg-config libtool makeWrapper ];
+  buildInputs = [
+    adns curl gmp gnutls libextractor libgcrypt libgnurl libidn
+    libmicrohttpd libunistring libxml2 ncurses gettext libsodium
+    sqlite zlib libpulseaudio libopus libogg jansson
+  ] ++ lib.optional postgresqlSupport postgresql;
+
+  preConfigure = ''
+    # Brute force: since nix-worker chroots don't provide
+    # /etc/{resolv.conf,hosts}, replace all references to `localhost'
+    # by their IPv4 equivalent.
+    find . \( -name \*.c -or -name \*.conf \) | \
+      xargs sed -ie 's|\<localhost\>|127.0.0.1|g'
+
+    # Make sure the tests don't rely on `/tmp', for the sake of chroot
+    # builds.
+    find . \( -iname \*test\*.c -or -name \*.conf \) | \
+      xargs sed -ie "s|/tmp|$TMPDIR|g"
+
+    sed -ie 's|@LDFLAGS@|@LDFLAGS@ $(Z_LIBS)|g' \
+      src/regex/Makefile.in \
+      src/fs/Makefile.in
+  '';
+
+  # unfortunately, there's still a few failures with impure tests
+  doCheck = false;
+  checkPhase = ''
+    export GNUNET_PREFIX="$out"
+    export PATH="$out/bin:$PATH"
+    make -k check
+  '';
+
+  meta = with lib; {
+    description = "GNU's decentralized anonymous and censorship-resistant P2P framework";
+
+    longDescription = ''
+      GNUnet is a framework for secure peer-to-peer networking that
+      does not use any centralized or otherwise trusted services.  A
+      first service implemented on top of the networking layer
+      allows anonymous censorship-resistant file-sharing.  Anonymity
+      is provided by making messages originating from a peer
+      indistinguishable from messages that the peer is routing.  All
+      peers act as routers and use link-encrypted connections with
+      stable bandwidth utilization to communicate with each other.
+      GNUnet uses a simple, excess-based economic model to allocate
+      resources.  Peers in GNUnet monitor each others behavior with
+      respect to resource usage; peers that contribute to the
+      network are rewarded with better service.
+    '';
+
+    homepage = "https://gnunet.org/";
+    license = licenses.agpl3Plus;
+    maintainers = with maintainers; [ pstn vrthra ];
+    platforms = platforms.gnu ++ platforms.linux;
+  };
+}