=> 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-cppo-1.6.0
File "_build/.jbuilds/default/src/jbuild", line 5, characters 0-25:
Warning: File cppo_parser.mli is both generated by a rule and present in the source tree.
As a result, the rule is currently ignored, however this will become an error in the future.
Delete file src/cppo_parser.mli to get rid of this warning.
Error: External library "ocamlbuild" not found.
-> required by "ocamlbuild_plugin/jbuild (context default)"
Hint: try: jbuilder external-lib-deps --missing @install
*** Error code 1

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

Stop.
make: stopped in /data/pkgsrc/devel/ocaml-cppo