As announced in [MBF] and [#1117130] the GNOME team would like to remove
libgirepository1.0-dev during the forky cycle. According to dak, this
source package contains a Depends or Build-Depends on
libgirepository1.0-dev which blocks its removal.

The README.Debian for libgirepository1.0-dev [README] provides advice on
how to choose an appropriate replacement for libgirepository1.0-dev, and
will be updated if new information becomes available.

ruby-gir-ffi seems to be a language binding that uses libgirepository-1.0,
so probably it should use libgirepository-1.0-dev (or
libgirepository-2.0-dev) as its replacement.

References:
[README]:
https://salsa.debian.org/gnome-team/gobject-introspection/-/blob/HEAD/debian/libgirepository1.0-dev.README.Debian
    file:///usr/share/doc/libgirepository1.0-dev/README.Debian.gz
[#1117130]:
https://bugs.debian.org/1117130
[MBF]:
https://lists.debian.org/debian-devel/2025/08/msg00150.html

Thanks,
    smcv

Control: tags -1 + patch

Please consider
<https://salsa.debian.org/ruby-team/ruby-gir-ffi/-/merge_requests/1>
which also cleans up some other large/unnecessary Build-Depends.

Thanks,
     smcv