Updating OCaml in brew broke all the binaries in my switch

Community
1

After updating my system OCaml using homebrew to 4.06.1, all the of the binaries in my 4.05 broke. Here’s the error that I’m getting whenever I run anything in 4.05.0 (e.g. topkg):

Cannot load required shared library dllunix.
Reason: /usr/local/lib/ocaml/stublibs/dllunix.so: dlopen(/usr/local/lib/ocaml/stublibs/dllunix.so, 138): Symbol not found: _caml_ba_compare
  Referenced from: /usr/local/lib/ocaml/stublibs/dllunix.so
  Expected in: flat namespace
 in /usr/local/lib/ocaml/stublibs/dllunix.so.

Anyone have an explanation why this is occuring? Why are the binaries in my switch even looking for a system dllunix.so? Shouldn’t there be a per switch one.

2

Hmm, I have the same version of OCaml from homebrew but no such issue. I assume you ran:

eval $(opam config env)
3

Nope, I did not forget eval.

4

Could you put down the exact steps you did?