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@Astara . . . Do you by any chance have "testing" in your sources.list? If, yes you might have pulled in Debian Bullseye. Always use the Devuan release name in your sources.
Not that I know -- only went, at first for the DVD and selected sections from ascii for 'non-free main contrib'.
I had the prob after booting from that DVD of not being able to install gcc due to previously mentioned error -- that's when I started looking for
other sources on net as I thought I was missing one or more packages.
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What's different about beowulf v. ascii?
Maybe I should switch to beowulf if it has option to disable /usrmerge.Why did ascii go with a forced usr mrg when it isn't being forced on beowulf?
I got /usr merged in one ascii install that I did when ascii was still in testing (Nov. 2017). It no longer does that.
I don't know of any way to undo it.
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To unmerge is possible but slightly tedious. It just means to move any binary that installs as "/bin/X" (and thus wrongly has falled into "/usr/bin/X" due to /bin-->/usr/bin) back into a proper /bin directory. Likewise for /lib and /usr/lib, although that has the additional complication of getting dynamic libraries re-registered (ldconfig).
Eg a command
dpkg -l | awk '{print $2;}' | xargs -n1 dpkg -L | grep ^/bin/
will tell you which programs are supposed to be in /bin. Similarly for /lib.
But it is a bit tedious.
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