ANNOUNCE: GHC 7.10.1 Release Candidate 1 - problem with latest cabal-install

[Edward Z. Yang]

Oh, because Cabal HQ hasn't cut a release yet.

Try installing out of Git.  https://github.com/haskell/cabal/

Edward

Excerpts from George Colpitts's message of 2015-01-01 14:23:50 -0500:
> I still have 7.8.3 but it doesn't seem to want to build the latest cabal:
> 
>  ghc --version
> The Glorious Glasgow Haskell Compilation System, version 7.8.3
> bash-3.2$ cabal install cabal-install
> Resolving dependencies...
> Configuring cabal-install-1.20.0.6...
> Building cabal-install-1.20.0.6...
> Installed cabal-install-1.20.0.6
> Updating documentation index
> /Users/gcolpitts/Library/Haskell/share/doc/index.html
> 
> On Thu, Jan 1, 2015 at 2:54 PM, Edward Z. Yang <ezyang at mit.edu> wrote:
> 
> > If you still have your old GHC around, it will be much better to
> > compile the newest cabal-install using the *old GHC*, and then
> > use that copy to bootstrap a copy of the newest cabal-install.
> >
> > Edward
> >
> > Excerpts from George Colpitts's message of 2015-01-01 12:08:44 -0500:
> > > ​$ ​
> > > cabal update
> > > Downloading the latest package list from hackage.haskell.org
> > > Note: *there is a new version of cabal-install available.*
> > > To upgrade, run: cabal install cabal-install
> > > bash-3.2$ *cabal install -j3 cabal-install *
> > > *​...​*
> > >
> > >
> > > *Resolving dependencies...cabal: Could not resolve dependencies:*
> > > trying: cabal-install-1.20.0.6 (user goal)
> > > trying: base-4.8.0.0/installed-779... (dependency of
> > cabal-install-1.20.0.6)
> > > next goal: process (dependency of cabal-install-1.20.0.6)
> > > rejecting: process-1.2.1.0/installed-2db... (conflict: unix==2.7.1.0,
> > > process
> > > => unix==2.7.1.0/installed-4ae...)
> > > trying: process-1.2.1.0
> > > next goal: directory (dependency of cabal-install-1.20.0.6)
> > > rejecting: directory-1.2.1.1/installed-b08... (conflict: directory =>
> > > time==1.5.0.1/installed-c23..., cabal-install => time>=1.1 && <1.5)
> > > rejecting: directory-1.2.1.0 (conflict: base==4.8.0.0/installed-779...,
> > > directory => base>=4.5 && <4.8)
> > > rejecting: directory-1.2.0.1, 1.2.0.0 (conflict:
> > > base==4.8.0.0/installed-779..., directory => base>=4.2 && <4.7)
> > > rejecting: directory-1.1.0.2 (conflict: base==4.8.0.0/installed-779...,
> > > directory => base>=4.2 && <4.6)
> > > rejecting: directory-1.1.0.1 (conflict: base==4.8.0.0/installed-779...,
> > > directory => base>=4.2 && <4.5)
> > > rejecting: directory-1.1.0.0 (conflict: base==4.8.0.0/installed-779...,
> > > directory => base>=4.2 && <4.4)
> > > rejecting: directory-1.0.1.2, 1.0.1.1, 1.0.1.0, 1.0.0.3, 1.0.0.0
> > (conflict:
> > > process => directory>=1.1 && <1.3)
> > > Dependency tree exhaustively searched.
> >