Errors in building effects-examples

[doug719]

I installed the 5.0.0 today (29 June 2023)

Error 1
Did a make: File "aio/dune", line 3, characters 12-16:
3 | (libraries unix)
^^^^
Error: Library "unix" in /home/doug/.opam/5.0.0/lib/ocaml is hidden
*** fix
In .opam/5.0.0/lib/ocaml
I did: cp unix/unix* .
which fixed this problem

Error 2
Did a make: File "mvar/dune", line 3, characters 24-32:
3 | (libraries threads lwt lwt.unix)
^^^^^^^^
Error: Library "lwt.unix" not found.
*** fix
opam install conduit-lwt-unix

[kayceesrk]

On my Mac, make succeeds without a failure both on 5.0.0 and 5.1.0~rc3. Can you make sure your opam switch is set up right? It may just be a matter of not having run eval $(opam env) after switching to a different opam switch.

@dra27 does the failure remind you of an opam switch issue?