PASS opam => [build cow.0.6.1 OCamlPro/opam-repository:master with 4.02.0 on Linux (x86_64)]

/github/OCamlPro/opam-repository/task/54385
PASS opam => [build cow.0.6.1 OCamlPro/opam-repository:master with 4.00.1 on Linux (x86_64)]

/github/OCamlPro/opam-repository/task/54383