$DUB_HOME support is missing

[brianush1]

https://dub.pm/dub-reference/dub_home/

[MrcSnm]

What feature are you wanting? The environment variable or the entire specification? (Regarding the cache path and thing like that).
I don't really recall but that may be hard or easy to implement given how I've done

[MrcSnm]

Ok I think that's actually very easy