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/admin/dehydrated/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, coreutils, curl, diffutils, gawk, gnugrep, gnused, openssl, makeWrapper, fetchFromGitHub, installShellFiles }:
+stdenv.mkDerivation rec {
+  pname = "dehydrated";
+  version = "0.7.0";
+
+  src = fetchFromGitHub {
+    owner = "lukas2511";
+    repo = "dehydrated";
+    rev = "v${version}";
+    sha256 = "09jhmkjvnj98zbf92qwdr5rr7pc6v63xzyk2fbi177r7szb2yg09";
+  };
+
+  nativeBuildInputs = [ makeWrapper installShellFiles ];
+
+  installPhase = ''
+    installManPage docs/man/dehydrated.1
+
+    mkdir -p "$out/share/docs/dehydrated"
+    cp docs/*.md "$out/share/docs/dehydrated"
+    cp -r docs/examples "$out/share/docs/dehydrated"
+    cp {CHANGELOG,LICENSE,README.md} "$out/share/docs/dehydrated"
+
+    mkdir -p $out/bin
+    cp -a dehydrated $out/bin
+    wrapProgram "$out/bin/dehydrated" --prefix PATH : "${lib.makeBinPath [ openssl coreutils gnused gnugrep diffutils curl gawk ]}"
+    '';
+
+  meta = with lib; {
+    inherit (src.meta) homepage;
+    description = "Letsencrypt/acme client implemented as a shell-script";
+    license = licenses.mit;
+    platforms = platforms.all;
+    maintainers = [ maintainers.pstn ];
+  };
+}