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/development/ocaml-modules/z3/default.nix

@@ -0,0 +1,35 @@
+{ stdenv, lib, ocaml, findlib, zarith, z3 }:
+
+if lib.versionOlder ocaml.version "4.07"
+then throw "z3 is not available for OCaml ${ocaml.version}"
+else
+
+let z3-with-ocaml = (z3.override {
+  ocamlBindings = true;
+  inherit ocaml findlib zarith;
+}); in
+
+stdenv.mkDerivation {
+
+  pname = "ocaml${ocaml.version}-z3";
+  inherit (z3-with-ocaml) version;
+
+  dontUnpack = true;
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $OCAMLFIND_DESTDIR
+    cp -r ${z3-with-ocaml.ocaml}/lib/ocaml/${ocaml.version}/site-lib/stublibs $OCAMLFIND_DESTDIR
+    cp -r ${z3-with-ocaml.ocaml}/lib/ocaml/${ocaml.version}/site-lib/Z3 $OCAMLFIND_DESTDIR/z3
+    runHook postInstall
+  '';
+
+  nativeBuildInputs = [ findlib ];
+  propagatedBuildInputs = [ zarith ];
+
+  strictDeps = true;
+
+  meta = z3.meta // {
+    description = "Z3 Theorem Prover (OCaml API)";
+  };
+}