Comment 4 for bug 1690170

it does not and is hard-disabled there to my knowledge ...

classic snaps use the host filesystem and there is no guarantee that search paths and file locations match. i heard there will be special classic modes for other distros, so that you can package in something like opensuse-classic mode but given the differences between distros (and the fact that we default to use ubuntu binary debs for building the snaps as build and and bundled runtime deps) currently ties classic mode to ubuntu only AFAIK.

i dont know where/if this is documented anywhere though, you have to talk to someone from the snapd team (mvo, zyga gustavo) for more details...