[oe] Behaviour when bitbaking a specific version with DEFAULT_PREFERENCE = "-1"

[Leon Woestenberg]

Hello,

when I perform a bitbake package-version.bb, whilst that package has
DEFAULT_PREFERENCE -1, weird things happen.

In my case, two versions get built concurrently and the output doesn't
make sense.

Can the bitbake guru's think about catching this case (and probably do
something more senseful)?

Thanks, regards,
-- 
Leon