Issue with package "pretty"

Ian Lynagh igloo at
Sun Apr 27 13:47:35 EDT 2008

On Sun, Apr 27, 2008 at 06:32:57PM +0100, David MacIver wrote:
> The problem is that if you install pretty, Cabal will suddenly cease
> working until you recompile it. It depends on a version of pretty
> which gets bundled with GHC is purportedly of the same version as the
> one on hackage, but the two aren't binary compatible. So when it tries
> to use it, everything goes boom.

If you compile with different flags then the results will not
necessarily be binary compatible. I suspect that's what happened here.


More information about the Libraries mailing list