Bytecode build does not work: `E: Section executable gufo requires native compilation`

[barracuda156]

Also bytecode build does not work:

--->  Configuring gufo
Executing:  cd "/opt/local/var/macports/build/gufo-1c7613b6/work/gufo-0.1.2" && /opt/local/bin/ocaml /opt/local/var/macports/build/gufo-1c7613b6/work/gufo-0.1.2/setup.ml -configure --prefix /opt/local --destdir /opt/local/var/macports/build/gufo-1c7613b6/work/destroot
W: Field 'ocamlopt' is not set
E: Section executable gufo requires native compilation
E: Failure("1 configuration error")
Command failed:  cd "/opt/local/var/macports/build/gufo-1c7613b6/work/gufo-0.1.2" && /opt/local/bin/ocaml /opt/local/var/macports/build/gufo-1c7613b6/work/gufo-0.1.2/setup.ml -configure --prefix /opt/local --destdir /opt/local/var/macports/build/gufo-1c7613b6/work/destroot
Exit code: 1

[barracuda156]

Unnecessarily so, since it actually can build as bytecode and run normally: