FAILED (unknown) opam => [build zarith.1.2 OCamlPro/opam-repository:master with 4.01.0 on Darwin (x86_64)]

/github/OCamlPro/opam-repository/task/11275
FAILED (unknown) opam => [build gsl.1.11.0 OCamlPro/opam-repository:master with 4.01.0 on FreeBSD (i386)]

/github/OCamlPro/opam-repository/task/11321