{
lib,
buildDunePackage,
cstruct,
}:
if lib.versionOlder (cstruct.version or "1") "3" then
cstruct
else
buildDunePackage {
pname = "cstruct-unix";
inherit (cstruct) version src meta;
minimalOCamlVersion = "4.08";
duneVersion = "3";
propagatedBuildInputs = [ cstruct ];
}