liblwt-ssl-ocaml-dev - 2.7.1-4+b1 main

Lwt is a library for cooperative threads implemented in a monadic style.
Unlike preemptive threads, cooperative threads do not use a scheduler to
distribute processor time between threads. Instead, each thread must
announce that it wants to let the others run.
.
This package contains all the development stuff you need to use Lwt
with cooperative OpenSSL in your programs.