Cabal and simultaneous installations of the same package

[Duncan Coutts]

On Mon, 2015-03-23 at 20:13 +0000, Simon Peyton Jones wrote:
> But I'm hazy about why sandboxes are needed at all.  As I understand
> it, they were invented to solve the very problem that is now solved
> (if only Cabal could take advantage of it).

Yes, the nix approach would subsume sandboxes.

I cover this in this post
http://www.well-typed.com/blog/preview/how-we-might-abolish-cabal-hell-2/


Duncan