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/misc/ponysay/default.nix

@@ -0,0 +1,36 @@
+{ lib, stdenv, fetchFromGitHub, python3, texinfo, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  pname = "ponysay";
+  version = "unstable-2021-03-27";
+
+  src = fetchFromGitHub {
+    owner = "erkin";
+    repo = "ponysay";
+    rev = "8a2c71416e70e4e7b0931917ebfd6479f51ddf9a";
+    sha256 = "sha256-LNc83E+7NFYYILORElNlYC7arQKGUJHv6phu+vM5xpQ=";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ python3 texinfo ];
+
+  inherit python3;
+
+  installPhase = ''
+    find -type f -name "*.py" | xargs sed -i "s@/usr/bin/env python3@$python3/bin/python3@g"
+    substituteInPlace setup.py --replace \
+        "fileout.write(('#!/usr/bin/env %s\n' % env).encode('utf-8'))" \
+        "fileout.write(('#!%s/bin/%s\n' % (os.environ['python3'], env)).encode('utf-8'))"
+    python3 setup.py --prefix=$out --freedom=partial install \
+        --with-shared-cache=$out/share/ponysay \
+        --with-bash
+  '';
+
+  meta = with lib; {
+    description = "Cowsay reimplemention for ponies";
+    homepage = "https://github.com/erkin/ponysay";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ bodil ];
+    platforms = platforms.unix;
+  };
+}