# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian [ERROR] No solution for async_smtp.v0.12.0: The following dependencies couldn't be met: - async_smtp -> ocaml >= 4.07.0 base of this switch (use `--unlock-base' to force) Command failed: opam list --readonly --external --resolve=async_smtp.v0.12.0 returned 20 Command 'docker run --rm -i -v opam-health-check-default-dune-cache:/home/opam/.cache/dune opam-health-check-default-4.02.3 bash' failed.