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/tar/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, fetchFromGitHub
+, buildDunePackage
+, camlp-streams
+, ppx_cstruct
+, cstruct
+, re
+, ppx_tools
+}:
+
+buildDunePackage rec {
+  pname = "tar";
+  version = "2.0.1";
+  src = fetchFromGitHub {
+    owner = "mirage";
+    repo = "ocaml-tar";
+    rev = "v${version}";
+    sha256 = "1zr1ak164k1jm15xwqjf1iv77kdrrahak33wrxg7lifz9nnl0dms";
+  };
+
+  useDune2 = true;
+
+  propagatedBuildInputs = [
+    camlp-streams
+    ppx_cstruct
+    cstruct
+    re
+  ];
+
+  buildInputs = [
+    ppx_tools
+  ];
+
+  doCheck = true;
+
+  meta = {
+    description = "Decode and encode tar format files from Unix";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.ulrikstrid ];
+  };
+}

pkgs/development/ocaml-modules/tar/unix.nix

@@ -0,0 +1,27 @@
+{ lib
+, buildDunePackage
+, tar
+, cstruct
+, cstruct-lwt
+, re
+, lwt
+}:
+
+buildDunePackage rec {
+  pname = "tar-unix";
+  inherit (tar) version src useDune2 doCheck;
+
+  propagatedBuildInputs = [
+    tar
+    cstruct
+    cstruct-lwt
+    re
+    lwt
+  ];
+
+  meta = {
+    description = "Decode and encode tar format files from Unix";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.ulrikstrid ];
+  };
+}