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/text/hyx/default.nix

@@ -0,0 +1,30 @@
+{ lib, stdenv, fetchurl, memstreamHook }:
+
+stdenv.mkDerivation rec {
+  pname = "hyx";
+  version = "2021.06.09";
+
+  src = fetchurl {
+    url = "https://yx7.cc/code/hyx/hyx-${lib.replaceStrings [ "-" ] [ "." ] version}.tar.xz";
+    sha256 = "sha256-jU8U5YWE1syPBOQ8o4BC7tIYiCo4kknCCwhnMCVtpes=";
+  };
+
+  postPatch = lib.optionalString stdenv.isDarwin ''
+    substituteInPlace Makefile \
+      --replace "-Wl,-z,relro,-z,now -fpic -pie" ""
+  '';
+
+  buildInputs = lib.optional (stdenv.system == "x86_64-darwin") memstreamHook;
+
+  installPhase = ''
+    install -vD hyx $out/bin/hyx
+  '';
+
+  meta = with lib; {
+    description = "minimalistic but powerful Linux console hex editor";
+    homepage = "https://yx7.cc/code/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fpletz ];
+    platforms = with platforms; linux ++ darwin;
+  };
+}