Dear Maintainer,
* I ugraded my raspi 3B from raspian (armhf) to debian arm64. To
reduce the amount of writes on the SD card, I use tmp.mount with
Options=mode=1777,strictatime,nosuid,nodev,noexec,size=128M,nr_inodes=400k
that's right: in memory, very small size, no exec. With such
settings, 'unattended-upgrades' fails as it tries to execute a
script from /tmp
* other programs are run as: env TMP=/var/tmp some_command
in case they require to generate and execute some script. But
this approach sometimes fails with unattended-upgrades