Thanks for bringing this up.

I think that this should ideally be done upstream, instead of having to copy and paste the logic into each binding. For example by adding a list_gir_search_paths to gobject-introspection (could you please file a bug there? it would be really helpful). I am happy to add a workaround into haskell-gi until that's done.

Just to make sure I understand what we need to do in haskell-gi, could you please let me know what you get if you run the following?

pkg-config --variable=girdir gobject-introspection-1.0

I think that this should ideally be done upstream, instead of having to copy and paste the logic into each binding. For example by adding a list_gir_search_paths to gobject-introspection (could you please file a bug there? it would be really helpful). I am happy to add a workaround into haskell-gi until that's done.

Sounds reasonable to me. Unfortunately I have not worked with gobject-intreospection at all, so I don't think I would be the right person to open a bug there and move the discussion forward. Simon McVittie (who opened the Debian bug report and also proposed the patches for gobject-introspection and vala) may be able to help move this forward.

For the time being, I have used a very quick-n-dirty patch (see https://salsa.debian.org/haskell-team/DHG_packages/-/commit/438bb77d83cdcef739cb160db8a57eb068ad9eb7) to add /usr/lib/${DEB_HOST_MULTIARCH}/gir-1.0 to the list of paths haskell-gi searches for GIR files in Debian.

Just to make sure I understand what we need to do in haskell-gi, could you please let me know what you get if you run the following?

pkg-config --variable=girdir gobject-introspection-1.0

$ pkg-config --variable=girdir gobject-introspection-1.0
/usr/share/gir-1.0

Right now, this returns the old path, even though some files have moved under /usr/lib/${DEB_HOST_MULTIARCH}/gir-1.0

$ ls -l /usr/share/gir-1.0/GLib-2.0.gir 
lrwxrwxrwx 1 root root 47 Sep 21 11:58 /usr/share/gir-1.0/GLib-2.0.gir -> ../../lib/x86_64-linux-gnu/gir-1.0/GLib-2.0.gir
$ ls -l /usr/lib/x86_64-linux-gnu/gir-1.0/
total 3860
-rw-r--r-- 1 root root 3952058 Oct 26 17:01 GLib-2.0.gir