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/ocaml-freestanding/default.nix

@@ -0,0 +1,78 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, ocaml
+, pkg-config
+, solo5
+, target ? "xen"
+}:
+
+# note: this is not technically an ocaml-module,
+# but can be built with different compilers, so
+# the ocamlPackages set is very useful.
+
+let
+  pname = "ocaml-freestanding";
+in
+
+if lib.versionOlder ocaml.version "4.08"
+then builtins.throw "${pname} is not available for OCaml ${ocaml.version}"
+else
+
+stdenv.mkDerivation rec {
+  name = "ocaml${ocaml.version}-${pname}-${version}";
+  inherit pname;
+  version = "0.6.5";
+
+  src = fetchFromGitHub {
+    owner = "mirage";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256:1mbyjzwcs64n7i3xkkyaxgl3r46drbl0gkqf3fqgm2kh3q03638l";
+  };
+
+  postUnpack = ''
+    # get ocaml-src from the ocaml drv instead of via ocamlfind
+    mkdir -p "${src.name}/ocaml"
+    tar --strip-components=1 -xf ${ocaml.src} -C "${src.name}/ocaml"
+  '';
+
+  patches = [
+    ./no-opam.patch
+    ./configurable-binding.patch
+  ];
+
+  nativeBuildInputs = [
+    ocaml
+    pkg-config
+  ];
+
+  propagatedBuildInputs = [ solo5 ];
+
+  configurePhase = ''
+    runHook preConfigure
+    env PKG_CONFIG_DEPS=solo5-bindings-${target} sh configure.sh
+    runHook postConfigure
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    ./install.sh "$out"
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Freestanding OCaml runtime";
+    license = licenses.mit;
+    maintainers = [ maintainers.sternenseemann ];
+    homepage = "https://github.com/mirage/ocaml-freestanding";
+    platforms = builtins.map ({ arch, os }: "${arch}-${os}")
+      (cartesianProductOfSets {
+          arch = [ "aarch64" "x86_64" ];
+          os = [ "linux" ];
+      } ++ [
+        { arch = "x86_64"; os = "freebsd"; }
+        { arch = "x86_64"; os = "openbsd"; }
+      ]);
+  };
+}