[Haskell] [Haskell-cafe] Proposal to incorporate Haskell.org

[Tom Murphy]

> Q: Does this mean that my Haskell project must now be covered by a
>      copyleft licence such as GPL?
> A: No, but Haskell projects using haskell.org resource should use an
>     Open Source licence
>      <http://www.opensource.org/licenses/alphabetical>.
>

"Should" == must?
Would this apply to everything on Hackage?

Thanks for clarifying,
Tom