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/tools/networking/cjdns/default.nix

@@ -0,0 +1,45 @@
+{ lib, stdenv, fetchFromGitHub, nodejs, which, python3, util-linux, nixosTests }:
+
+stdenv.mkDerivation rec {
+  pname = "cjdns";
+  version = "21.1";
+
+  src = fetchFromGitHub {
+    owner = "cjdelisle";
+    repo = "cjdns";
+    rev = "cjdns-v${version}";
+    sha256 = "NOmk+vMZ8i0E2MjrUzksk+tkJ9XVVNEXlE5OOTNa+Y0=";
+  };
+
+  buildInputs = [ which python3 nodejs ] ++
+    # for flock
+    lib.optional stdenv.isLinux util-linux;
+
+  NIX_CFLAGS_COMPILE = [
+    "-O2"
+    "-Wno-error=array-bounds"
+    "-Wno-error=stringop-overflow"
+    "-Wno-error=stringop-truncation"
+  ] ++ lib.optionals (stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "11") [
+    "-Wno-error=stringop-overread"
+  ];
+
+  buildPhase =
+    lib.optionalString stdenv.isAarch32 "Seccomp_NO=1 "
+    + "bash do";
+  installPhase = ''
+    install -Dt "$out/bin/" cjdroute makekeys privatetopublic publictoip6
+    mkdir -p $out/share/cjdns
+    cp -R tools node_build node_modules $out/share/cjdns/
+  '';
+
+  passthru.tests.basic = nixosTests.cjdns;
+
+  meta = with lib; {
+    homepage = "https://github.com/cjdelisle/cjdns";
+    description = "Encrypted networking for regular people";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ ehmry ];
+    platforms = platforms.linux;
+  };
+}