Manjaro 21 XFCE
sudo ln -s /var/lib/snapd/snap /snap
[jar@jar-empty ~]$ sudo snap install calibre --edge
error: The publisher of snap "calibre" has indicated that they do not consider
this revision to be of production quality and that it is only meant for
development or testing at this point. As a consequence this snap will
not refresh automatically and may perform arbitrary system changes
outside of the security sandbox snaps are generally confined to, which
may put your system at risk.
If you understand and want to proceed repeat the command including
--devmode; if instead you want to install the snap forcing it into
strict confinement repeat the command including --jailmode.
[jar@jar-empty ~]$ sudo snap install calibre --jailmode
error: cannot install "calibre": this system cannot honour the jailmode flag
[jar@jar-empty ~]$ sudo snap install calibre --devmode
error: snap "calibre" is not available on stable but is available to install on
the following channels:
edge snap install --edge calibre
Please be mindful pre-release channels may include features not
completely tested or implemented. Get more information with 'snap info
calibre'.
[jar@jar-empty ~]$ sudo snap install --edge calibre
error: The publisher of snap "calibre" has indicated that they do not consider
this revision to be of production quality and that it is only meant for
development or testing at this point. As a consequence this snap will
not refresh automatically and may perform arbitrary system changes
outside of the security sandbox snaps are generally confined to, which
may put your system at risk.
If you understand and want to proceed repeat the command including
--devmode; if instead you want to install the snap forcing it into
strict confinement repeat the command including --jailmode.