Your code that uses Async_extra.Udp won't build anymore? Same here!

Jane Street accidentally dropped the Async_extra.Udp module from their v0.12 release of async_extra. 😆

You can get it back by doing:

opam pin add async_udp git+https://github.com/mbacarella/async_udp

Say yes if it asks to create a new package.

Add async_udp to your project's dune libraries list.

You'll have to change stuff like Async_extra.Udp to Async_udp in your code. Hopefully this is all you need to do.

Some discussion here:

janestreet/async_extra#13