Current Byzantium: the PureOS store says can’t upgrade missing dependencies.
Terminal updates and upgrades but it says
[purism@pureos ~]$ sudo apt-get upgrade
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
Calculating upgrade… Done
The following packages have been kept back:
librem5-base librem5-gnome-base librem5-non-gnome linux-image-librem5
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.