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nixpkgs/pkgs/development/ocaml-modules/variantslib/default.nix

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Nix

{ 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 ];
};
}