On Wed, Oct 3, 2012 at 6:21 PM, José Lopes <jose.lopes@ist.utl.pt> wrote:

Hello,

I just tried to upgrade cabal-install using an older version and it yields the following error: Distribution/Client/JobControl.hs:63:6: Not in scope: `mask'

We tested on GHC 7.0.4, 7.4.1, and 7.6.1.

If you need any machine/software specs let me know.

That would be great. Which version of GHC/base do you have? P.S. I'm not sure if we really want to support more than the 3 last GHC releases. People on really old GHCs can always use a older cabal-install. -- Johan