Comment 6 for bug 1814478

http://mirrors.kernel.org/ubuntu/pool/universe/d/dhex/dhex_0.69-3_amd64.deb

No longer exists.

So I tried:
dhex_0.69-4_amd64.deb

which errors out with:

dpkg: dependency problems prevent configuration of dhex:
 dhex depends on libc6 (>= 2.34); however:
  Version of libc6:amd64 on system is 2.31-0ubuntu9.9.