_ [debian] Installation of Recommends by default on October 1st

Apt will install recommends by default for new packages as if those were depends. But it will not complain about unsatisfied recommends on your system.

To turn this feature off, pass –no-install-recommends to apt or set, in your apt configuration, APT::Install-Recommends=False.

ref. Installation of Recommends by default on October 1st

とりあえず /etc/apt/apt.conf で

APT::Install-Recommends "false";

しておいた。