A drive is named sda - sdb - sdc etc.  sd(x) is the generic rendering of the location that needs to be adjusted to fit the specs of your system.  IOW, replace the (x) with the letter appropriate to your needs.

Chimaera is now our STABLE release.  Daedalus is "testing".

@entropyagent . . . Perhaps an attitude adjustment is warranted. Instead of bitching and telling Devuan what to do, you could actually CONTRIBUTE something to Devuan by becoming the official tracker of "no longer supported browsers".  Post to DNG and start a thread in News & Announcements and update as necessary.  Ball is in your court.

"merged" pulls in the unchanged packages directly from the Debian repos and merges them with packages that have been forked by Devuan.

pkgmaster.devuan.org is the repository that syncs all the package mirrors. It should not be used directly and should be removed from sources.list
deb.devuan.org is the round-robin that chooses a mirror from the mirror pool.
This changed some years ago, maybe during ascii . . .

Or comment it out with #

Repeating for truth . . . snapd is a banned package in Devuan.

desktop-base is a package where the desktop theme is configured.  Maybe you have an old configuration somewhere that is conflicting.

I would never trust that generosity of co-existence coming from LP et al/Red Hat.

Themselves and their "product" for sure. They have never once offered an option of compromise or collaboration.

From: https://www.devuan.org/os/packages

Personally, I would never touch anything from the 'buntus.

But your choice and you get to keep all the pieces. 

A quick note . . . it is advised not to use pkgmaster in sources.list because it is the source that all mirrors sync with.  Please use one of the many mirrors offered on https://www.devuan.org/get-devuan instead.

https://pkgmaster.devuan.org/bannedpackages.txt

And do so at your own risk . . .