1 files changed, 26 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/ocaml-modules/variantslib/default.nix b/nixpkgs/pkgs/development/ocaml-modules/variantslib/default.nix
new file mode 100644
index 000000000000..425383a64854
--- /dev/null
+++ b/nixpkgs/pkgs/development/ocaml-modules/variantslib/default.nix
@@ -0,0 +1,26 @@
+{ stdenv, buildOcaml, ocaml, fetchurl, type_conv }:
+
+if stdenv.lib.versionAtLeast ocaml.version "4.06"
+then throw "variantslib-109.15.03 is not available for OCaml ${ocaml.version}"
+else
+
+buildOcaml rec {
+  name = "variantslib";
+  version = "109.15.03";
+
+  minimumSupportedOcamlVersion = "4.00";
+
+  src = fetchurl {
+    url = "https://github.com/janestreet/variantslib/archive/${version}.tar.gz";
+    sha256 = "a948dcdd4ca54786fe0646386b6e37a9db03bf276c6557ea374d82740bf18055";
+  };
+
+  propagatedBuildInputs = [ type_conv ];
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/janestreet/variantslib;
+    description = "OCaml variants as first class values";
+    license = licenses.asl20;
+    maintainers = [ maintainers.ericbmerritt ];
+  };
+}