=> Bootstrap dependency digest>=20010302: found digest-20190127
===> Building for ocaml-spawn-0.12.0
File "bench/jbuild", line 1, characters 0-0:
Error: jbuild files are no longer supported, please convert this file to a
dune file instead.
Note: You can use "dune upgrade" to convert your project to dune.
*** Error code 1

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

Stop.
make: stopped in /usr/pkgsrc/devel/ocaml-spawn