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/tools/ocaml/ocp-build/default.nix

@@ -0,0 +1,41 @@
+{ lib, stdenv, fetchFromGitHub, fetchpatch, ocaml, findlib, ncurses, cmdliner, re }:
+
+stdenv.mkDerivation rec {
+  pname = "ocaml${ocaml.version}-ocp-build";
+  version = "1.99.21";
+
+  src = fetchFromGitHub {
+    owner = "OCamlPro";
+    repo = "ocp-build";
+    rev = "v${version}";
+    sha256 = "1641xzik98c7xnjwxpacijd6d9jzx340fmdn6i372z8h554jjlg9";
+  };
+
+  patches = [
+    # Fix compilation with OCaml 4.12
+    (fetchpatch {
+      url = "https://github.com/OCamlPro/ocp-build/commit/104e4656ca6dba9edb03b62539c9f1e10abcaae8.patch";
+      sha256 = "0sbyi4acig9q8x1ky4hckfg5pm2nad6zasi51ravaf1spgl148c2";
+    })
+  ];
+
+  buildInputs = [ ocaml findlib cmdliner re ];
+  propagatedBuildInputs = [ ncurses ];
+  preInstall = "mkdir -p $out/bin";
+
+  meta = with lib; {
+    description = "A build tool for OCaml";
+    longDescription = ''
+      ocp-build is a build system for OCaml application, based on simple
+      descriptions of packages. ocp-build combines the descriptions of
+      packages, and optimize the parallel compilation of files depending on
+      the number of cores and the automatically-inferred dependencies
+      between source files.
+    '';
+    homepage = "https://www.typerex.org/ocp-build.html";
+    license = licenses.gpl3;
+    maintainers = [ maintainers.jirkamarsik ];
+    mainProgram = "ocp-build";
+    inherit (ocaml.meta) platforms;
+  };
+}