[Haskell-cafe] Cabal upload issue

Neil Brown nccb2 at kent.ac.uk
Thu Nov 12 09:35:31 EST 2009

Jeremy O'Donoghue wrote:
> Hi all,
> I'm in the process of trying update the revisions of wx (part of
> wxHaskell) on hackage.
> I'm getting an error I find slightly surprising:
> ...
> Library
>     if flag(splitBase)
>         build-depends: base >= 3, wxcore >=, stm
Change this last line to base >= 3 && < 5 to get rid of the warning.  I 
think the idea is that if base becomes version 5, it will likely break 
your code, so you should specify ahead of time that this library isn't 
currently designed to work with a version of base beyond 4.  That way 
when someone installs your package in the future and you haven't tested 
with base 5, cabal will know to use base 4 for your library.



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