=> Bootstrap dependency digest>=20010302: found digest-20160304
===> Skipping vulnerability checks.
WARNING: No /var/db/pkg/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /var/db/pkg fetch-pkg-vulnerabilities'.
===> Building for ocaml-csv-2.0
Error: External library "lwt" not found.
-> required by "lwt.unix"
-> required by "tests/jbuild (context default)"
Hint: try: jbuilder external-lib-deps --missing @install
*** Error code 1

Stop.
make[1]: stopped in /data/pkgsrc/textproc/ocaml-csv
*** Error code 1

Stop.
make: stopped in /data/pkgsrc/textproc/ocaml-csv