devel/ocaml-opam: Fix quarterly build
PR: 295015
Reported by: Hannes Mehnert <hannes@mehnert.org> (maintainer)
Fixes: 8a91d1a951d8 (devel/ocaml-opam: update to 2.5.1)
(cherry picked from commit a1bbde07f7e4065a92ab5f06a2041f2ab4b6757a)