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/rfc7748/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildDunePackage
+, fetchFromGitHub
+, ocaml
+
+, ounit
+, zarith
+}:
+
+buildDunePackage rec {
+  pname = "rfc7748";
+  version = "1.0";
+
+  src = fetchFromGitHub {
+    owner = "burgerdev";
+    repo = "ocaml-rfc7748";
+    rev = "v${version}";
+    sha256 = "sha256-mgZooyfxrKBVQFn01B8PULmFUW9Zq5HJfgHCSJSkJo4=";
+  };
+
+  useDune2 = true;
+
+  minimumOCamlVersion = "4.05";
+
+  propagatedBuildInputs = [ zarith ];
+
+  # the tests fail for 4.05
+  doCheck = lib.versionAtLeast ocaml.version "4.06";
+  checkInputs = [ ounit ];
+
+  meta = {
+    homepage = "https://github.com/burgerdev/ocaml-rfc7748";
+    description = "Elliptic Curve Diffie-Hellman on Edwards Curves (X25519, X448)";
+    longDescription = ''
+      This library implements the ECDH functions 'X25519' and 'X448' as specified
+      in RFC 7748, 'Elliptic curves for security'. In the spirit of the original
+      publications, the public API is kept as simple as possible to make it easy
+      to use and hard to misuse.
+    '';
+    license = lib.licenses.bsd2;
+    maintainers = with lib.maintainers; [ fufexan ];
+  };
+}