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/fpp/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub, python3, installShellFiles }:
+
+stdenv.mkDerivation rec {
+  pname = "fpp";
+  version = "0.9.5";
+
+  src = fetchFromGitHub {
+    owner = "facebook";
+    repo = "PathPicker";
+    rev = version;
+    sha256 = "sha256-4BkdGvG/RyF3JBnd/X5r5nboEHG4aqahcYHDunMv2zU=";
+  };
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  postPatch = ''
+    substituteInPlace fpp --replace 'PYTHONCMD="python3"' 'PYTHONCMD="${python3.interpreter}"'
+  '';
+
+  installPhase = ''
+    mkdir -p $out/share/fpp $out/bin
+    cp -r fpp src $out/share/fpp
+    ln -s $out/share/fpp/fpp $out/bin/fpp
+    installManPage debian/usr/share/man/man1/fpp.1
+  '';
+
+  meta = {
+    description = "CLI program that accepts piped input and presents files for selection";
+    homepage = "https://facebook.github.io/PathPicker/";
+    license = lib.licenses.bsd3;
+    platforms = lib.platforms.all;
+  };
+}