1 files changed, 28 insertions, 0 deletions
diff --git a/pkgs/build-support/ocaml/topkg.nix b/pkgs/build-support/ocaml/topkg.nix
new file mode 100644
index 00000000000..73be5815e44
--- /dev/null
+++ b/pkgs/build-support/ocaml/topkg.nix
@@ -0,0 +1,28 @@
+{ lib, stdenv, fetchurl, ocaml, findlib, topkg, ocamlbuild, cmdliner, odoc, b0
+}:
+
+{ pname, version, nativeBuildInputs ? [ ], buildInputs ? [ ], ... }@args:
+
+lib.throwIf (args ? minimalOCamlVersion
+  && lib.versionOlder ocaml.version args.minimalOCamlVersion)
+"${pname}-${version} is not available for OCaml ${ocaml.version}"
+
+stdenv.mkDerivation ({
+
+  dontAddStaticConfigureFlags = true;
+  configurePlatforms = [ ];
+  strictDeps = true;
+  inherit (topkg) buildPhase installPhase;
+
+} // (builtins.removeAttrs args [ "minimalOCamlVersion" ]) // {
+
+  name = "ocaml${ocaml.version}-${pname}-${version}";
+
+  nativeBuildInputs = [ ocaml findlib ocamlbuild topkg ] ++ nativeBuildInputs;
+  buildInputs = [ topkg ] ++ buildInputs;
+
+  meta = (args.meta or { }) // {
+    platforms = args.meta.platforms or ocaml.meta.platforms;
+  };
+
+})