I suggest reverting commit 33a1ec29fa0ad72c61cef13c8af08c847eb399c1
('guix: dune-build-system: Add a profile parameter.') and instead
applying attached patch.

The attached patch sets the '--release' flag instead of '--profile
release'. From 'dune --help':

--8<---------------cut here---------------start------------->8---
--release
   Put dune into a reproducible release mode. This is in fact a
   shorthand for --root . --ignore-promoted-rules --no-config
   --profile release --always-show-command-line
   --promote-install-files --default-target @install. You should use
   this option for release builds. For instance, you must use this
   option in your <package>.opam files. Except if you already use -p,
   as -p implies this option.
--8<---------------cut here---------------end--------------->8---

I think this is what we want.

Setting '--profile release' was not enough and was causing
inconsistencies with packages that were building with the '-p' flag.

-pukkamustard