QRE: Cabal and simultaneous installations of the same package

[Daniel Trstenjak]

Hi Simon,

On Mon, May 11, 2015 at 11:27:58AM +0000, Simon Peyton Jones wrote:
> Well, no one is actually suggesting that!

But you're just getting it automatically if you're depending e.g.
on the libraries A and B, and A depends on C 1.0 and B depends on C 2.0.

Currently you can't build this dependency graph, right? And with
this proposed feature you will be getting C 1.0 and 2.0 into your binary.


Perhaps a even more nasty case is, if you're using a haskell library
which wraps a stateful c library, and now you're having multiple
versions of the same haskell library operating on the same c library state.


Greetings,
Daniel