Package: apt Version: 1.4.7 Apparently apt-key requires gnupg even for Stretch:
root@stretch3:~# apt-key list E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation The system was setup using debootstrap. For Jessie there was no such problem. I would strongly recommend to move gnupg and its alternatives to Depends, as it was for Jessie. apt-key is essential for managing signed packages, which is one of the key features of Debian (IMHO). Regards Harri

