libgrokj2k embeds a Perl interpreter in ./src/lib/codec/common/exif.cpp.
The development package required for doing so is libperl-dev. It happens
to work by chance now, but as we are looking into removing libcrypt-dev
from the build-essential package set[1], libgrokj2k will fail to build
from source if it lacks this dependency. The actual dropping of
libcrypt-dev from build-essential is not going to happen during the
trixie freeze but some months into the forky cycle. The addition of
libperl-dev to Build-Depends is safe for inclusion into trixie, but it
does not warrant an upload of its own.

Helmut

[1] https://lists.debian.org/debian-devel/2025/04/msg00113.html