Fresh Debian LXCs have no locale configured, spamming "apt-listchanges:
Can't set locale" / perl warnings across every install and breaking some
packages' post-install scripts. Pin LANG/LC_ALL=C.UTF-8 (and hoist
DEBIAN_FRONTEND) at the top of the in-container bootstrap.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>