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/interpreters/eff/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchFromGitHub, which, ocamlPackages }:
+
+stdenv.mkDerivation rec {
+  pname = "eff";
+  version = "5.0";
+
+  src = fetchFromGitHub {
+    owner = "matijapretnar";
+    repo = "eff";
+    rev = "v${version}";
+    sha256 = "1fslfj5d7fhj3f7kh558b8mk5wllwyq4rnhfkyd96fpy144sdcka";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.ml --replace js_of_ocaml.ocamlbuild js_of_ocaml-ocamlbuild
+  '';
+
+  buildInputs = [ which ] ++ (with ocamlPackages; [
+    ocaml findlib ocamlbuild menhir js_of_ocaml js_of_ocaml-ocamlbuild
+  ]);
+
+  doCheck = true;
+  checkTarget = "test";
+
+  meta = with lib; {
+    homepage = "https://www.eff-lang.org";
+    description = "A functional programming language based on algebraic effects and their handlers";
+    longDescription = ''
+      Eff is a functional language with handlers of not only exceptions,
+      but also of other computational effects such as state or I/O. With
+      handlers, you can simply implement transactions, redirections,
+      backtracking, multi-threading, and much more...
+    '';
+    license = licenses.bsd2;
+    inherit (ocamlPackages.ocaml.meta) platforms;
+    maintainers = [ maintainers.jirkamarsik ];
+  };
+}