Bug#1040233: obus FTBFS with ocaml-dune 3.8.2-1

[Adrian Bunk <bunk@debian.org>]

On Mon, Jul 03, 2023 at 09:01:58PM +0300, Adrian Bunk wrote:
>...
>    dh_prep -a
>    debian/rules override_dh_auto_install
> make[1]: Entering directory '/<<PKGBUILDDIR>>'
> dune install --destdir=/<<PKGBUILDDIR>>/debian/tmp --prefix=/usr --libdir=../usr/lib/ocaml
> dune: option '--libdir': the path must be absolute to avoid ambiguity
> Usage: dune install [OPTION]… [PACKAGE]…
> Try 'dune install --help' or 'dune --help' for more information.
> make[1]: *** [debian/rules:14: override_dh_auto_install] Error 1

The new ocaml-dune breaks many packages, e.g.:
https://buildd.debian.org/status/fetch.php?pkg=ocaml-visitors&arch=mips64el&ver=20210608-1%2Bb2&stamp=1688407004&raw=0
https://buildd.debian.org/status/fetch.php?pkg=ppx-custom-printf&arch=mips64el&ver=0.15.0-1%2Bb1&stamp=1688407156&raw=0
https://buildd.debian.org/status/fetch.php?pkg=ppx-deriving-yojson&arch=mips64el&ver=3.7.0-1%2Bb1&stamp=1688407316&raw=0
https://buildd.debian.org/status/fetch.php?pkg=ppx-fields-conv&arch=mips64el&ver=0.15.0-1%2Bb1&stamp=1688407428&raw=0
https://buildd.debian.org/status/fetch.php?pkg=ppx-import&arch=mips64el&ver=1.10.0-1%2Bb1&stamp=1688407639&raw=0
https://buildd.debian.org/status/fetch.php?pkg=ppx-variants-conv&arch=mips64el&ver=0.15.0-1%2Bb1&stamp=1688407750&raw=0
https://buildd.debian.org/status/fetch.php?pkg=sexplib310&arch=mips64el&ver=1%3A0.15.1-1%2Bb2&stamp=1688407827&raw=0


cu
Adrian