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/coin/default.nix

@@ -0,0 +1,38 @@
+{ buildDunePackage
+, fetchurl
+, findlib
+, lib
+, ocaml
+, re
+}:
+
+buildDunePackage rec {
+  pname = "coin";
+  version = "0.1.4";
+  minimalOCamlVersion = "4.03";
+
+  src = fetchurl {
+    url = "https://github.com/mirage/coin/releases/download/v${version}/coin-${version}.tbz";
+    sha256 = "sha256:0069qqswd1ik5ay3d5q1v1pz0ql31kblfsnv0ax0z8jwvacp3ack";
+  };
+
+  postPatch = ''
+    substituteInPlace src/dune --replace 'ocaml} ' \
+      'ocaml} -I ${findlib}/lib/ocaml/${ocaml.version}/site-lib '
+  '';
+
+  nativeBuildInputs = [ findlib ];
+  buildInputs = [ re ];
+
+  strictDeps = true;
+
+  doCheck = true;
+
+  meta = {
+    description = "A library to normalize an KOI8-{U,R} input to Unicode";
+    homepage = "https://github.com/mirage/coin";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+    mainProgram = "coin.generate";
+  };
+}