$ /usr/bin/dub --version
DUB version 1.23.0, built on Sep 27 2020
$ /usr/bin/dmd --version
DMD64 D Compiler v2.094.0
Copyright (C) 1999-2020 by The D Language Foundation, All Rights Reserved written by Walter Bright
$ /usr/bin/dub build -v
Using dub registry url 'https://code.dlang.org/'
Refreshing local packages (refresh existing: true)...
Looking for local package map at /var/lib/dub/packages/local-packages.json
...
...
No valid package found in current working directory: Enforcement failed
Enforcement failed
